22102121011021 has 2 divisors, whose sum is σ = 22102121011022. Its totient is φ = 22102121011020.

The previous prime is 22102121011013. The next prime is 22102121011051. The reversal of 22102121011021 is 12011012120122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15902588718025 + 6199532292996 = 3987805^2 + 2489886^2 .

It is a cyclic number.

It is not a de Polignac number, because 22102121011021 - 2³ = 22102121011013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22102121010986 and 22102121011004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22102121011051) 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 as a sum of consecutive naturals, namely, 11051060505510 + 11051060505511.

It is an arithmetic number, because the mean of its divisors is an integer number (11051060505511).

Almost surely, 2^{22102121011021} is an apocalyptic number.

It is an amenable number.

22102121011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22102121011021 is an equidigital number, since it uses as much as digits as its factorization.

22102121011021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 22102121011021 its reverse (12011012120122), we get a palindrome (34113133131143).

The spelling of 22102121011021 in words is "twenty-two trillion, one hundred two billion, one hundred twenty-one million, eleven thousand, twenty-one".