102022102111981 has 2 divisors, whose sum is σ = 102022102111982. Its totient is φ = 102022102111980.

The previous prime is 102022102111967. The next prime is 102022102112017. The reversal of 102022102111981 is 189111201220201.

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., 88094949863881 + 13927152248100 = 9385891^2 + 3731910^2 .

It is a cyclic number.

It is not a de Polignac number, because 102022102111981 - 2⁹ = 102022102111469 is a prime.

It is a super-2 number, since 2×102022102111981² (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 (102022102171981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51011051055990 + 51011051055991.

It is an arithmetic number, because the mean of its divisors is an integer number (51011051055991).

Almost surely, 2^{102022102111981} is an apocalyptic number.

It is an amenable number.

102022102111981 is a deficient number, since it is larger than the sum of its proper divisors (1).

102022102111981 is an equidigital number, since it uses as much as digits as its factorization.

102022102111981 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 102022102111981 in words is "one hundred two trillion, twenty-two billion, one hundred two million, one hundred eleven thousand, nine hundred eighty-one".