122021112100981 has 2 divisors, whose sum is σ = 122021112100982. Its totient is φ = 122021112100980.

The previous prime is 122021112100967. The next prime is 122021112101107. The reversal of 122021112100981 is 189001211120221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79656517502500 + 42364594598481 = 8925050^2 + 6508809^2 .

It is a cyclic number.

It is not a de Polignac number, because 122021112100981 - 2²⁷ = 122020977883253 is a prime.

It is a super-2 number, since 2×122021112100981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122021112101981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61010556050490 + 61010556050491.

It is an arithmetic number, because the mean of its divisors is an integer number (61010556050491).

Almost surely, 2^{122021112100981} is an apocalyptic number.

It is an amenable number.

122021112100981 is a deficient number, since it is larger than the sum of its proper divisors (1).

122021112100981 is an equidigital number, since it uses as much as digits as its factorization.

122021112100981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 31.

The spelling of 122021112100981 in words is "one hundred twenty-two trillion, twenty-one billion, one hundred twelve million, one hundred thousand, nine hundred eighty-one".