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1212021112101 = 3404007037367
BaseRepresentation
bin10001101000110010000…
…101100111110100100101
311021212102211112212200120
4101220302011213310211
5124324204401041401
62324443402432153
7153365004320052
oct21506205476445
94255384485616
101212021112101
11428019358588
12176a93502659
138a3a6c31ba7
144293ac80029
15217da22b836
hex11a32167d25

1212021112101 has 4 divisors (see below), whose sum is σ = 1616028149472. Its totient is φ = 808014074732.

The previous prime is 1212021112097. The next prime is 1212021112147. The reversal of 1212021112101 is 1012111202121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212021112101 - 22 = 1212021112097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212021112151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202003518681 + ... + 202003518686.

It is an arithmetic number, because the mean of its divisors is an integer number (404007037368).

Almost surely, 21212021112101 is an apocalyptic number.

It is an amenable number.

1212021112101 is a deficient number, since it is larger than the sum of its proper divisors (404007037371).

1212021112101 is an equidigital number, since it uses as much as digits as its factorization.

1212021112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404007037370.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212021112101 its reverse (1012111202121), we get a palindrome (2224132314222).

The spelling of 1212021112101 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred twelve thousand, one hundred one".

Divisors: 1 3 404007037367 1212021112101