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201211323021 = 3353981714323
BaseRepresentation
bin1011101101100100100…
…0010010001010001101
3201020100202121021022000
42323121020102022031
511244040044314041
6232234000542513
720352130012002
oct2733110221215
9636322537260
10201211323021
1178373601105
1232bb5321a39
1315c88279467
149a4ad1b8a9
155379999bb6
hex2ed921228d

201211323021 has 32 divisors (see below), whose sum is σ = 303767349120. Its totient is φ = 131587327872.

The previous prime is 201211323011. The next prime is 201211323023. The reversal of 201211323021 is 120323112102.

201211323021 is a `hidden beast` number, since 201 + 211 + 3 + 230 + 21 = 666.

It is not a de Polignac number, because 201211323021 - 215 = 201211290253 is a prime.

It is a super-2 number, since 2×2012113230212 (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201211322985 and 201211323003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211323023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14040966 + ... + 14055288.

It is an arithmetic number, because the mean of its divisors is an integer number (9492729660).

Almost surely, 2201211323021 is an apocalyptic number.

It is an amenable number.

201211323021 is a deficient number, since it is larger than the sum of its proper divisors (102556026099).

201211323021 is a wasteful number, since it uses less digits than its factorization.

201211323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24202 (or 24196 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201211323021 its reverse (120323112102), we get a palindrome (321534435123).

The spelling of 201211323021 in words is "two hundred one billion, two hundred eleven million, three hundred twenty-three thousand, twenty-one".

Divisors: 1 3 9 27 53 159 477 1431 9817 14323 29451 42969 88353 128907 265059 386721 520301 759119 1560903 2277357 4682709 6832071 14048127 20496213 140608891 421826673 1265480019 3796440057 7452271223 22356813669 67070441007 201211323021