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2122202012221 = 3476115855943
BaseRepresentation
bin11110111000011101000…
…110001101101000111101
321111212202220111021100201
4132320131012031220331
5234232232203342341
64302532014123501
7306216100320124
oct36703506155075
97455686437321
102122202012221
1174902578a315
122a33691b0591
13125179a05c45
1474a02438abb
153a30b44b331
hex1ee1d18da3d

2122202012221 has 4 divisors (see below), whose sum is σ = 2128317868512. Its totient is φ = 2116086155932.

The previous prime is 2122202012209. The next prime is 2122202012251. The reversal of 2122202012221 is 1222102022212.

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 2122202012221 - 215 = 2122201979453 is a prime.

It is a super-2 number, since 2×21222020122212 (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122202012251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3057927625 + ... + 3057928318.

It is an arithmetic number, because the mean of its divisors is an integer number (532079467128).

Almost surely, 22122202012221 is an apocalyptic number.

It is an amenable number.

2122202012221 is a deficient number, since it is larger than the sum of its proper divisors (6115856291).

2122202012221 is an equidigital number, since it uses as much as digits as its factorization.

2122202012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115856290.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2122202012221 its reverse (1222102022212), we get a palindrome (3344304034433).

Subtracting from 2122202012221 its reverse (1222102022212), we obtain a palindrome (900099990009).

The spelling of 2122202012221 in words is "two trillion, one hundred twenty-two billion, two hundred two million, twelve thousand, two hundred twenty-one".

Divisors: 1 347 6115855943 2122202012221