122202031981 has 2 divisors, whose sum is σ = 122202031982. Its totient is φ = 122202031980.

The previous prime is 122202031969. The next prime is 122202032027. The reversal of 122202031981 is 189130202221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76701302500 + 45500729481 = 276950^2 + 213309^2 .

It is a cyclic number.

It is not a de Polignac number, because 122202031981 - 2¹¹ = 122202029933 is a prime.

It is a super-2 number, since 2×122202031981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122202031921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61101015990 + 61101015991.

It is an arithmetic number, because the mean of its divisors is an integer number (61101015991).

Almost surely, 2^122202031981 is an apocalyptic number.

It is an amenable number.

122202031981 is a deficient number, since it is larger than the sum of its proper divisors (1).

122202031981 is an equidigital number, since it uses as much as digits as its factorization.

122202031981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 122202031981 in words is "one hundred twenty-two billion, two hundred two million, thirty-one thousand, nine hundred eighty-one".