102022111009991 has 2 divisors, whose sum is σ = 102022111009992. Its totient is φ = 102022111009990.

The previous prime is 102022111009969. The next prime is 102022111010047. The reversal of 102022111009991 is 199900111220201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102022111009991 is a prime.

It is a super-2 number, since 2×102022111009991² (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 (102022111009891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51011055504995 + 51011055504996.

It is an arithmetic number, because the mean of its divisors is an integer number (51011055504996).

Almost surely, 2^{102022111009991} is an apocalyptic number.

102022111009991 is a deficient number, since it is larger than the sum of its proper divisors (1).

102022111009991 is an equidigital number, since it uses as much as digits as its factorization.

102022111009991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 102022111009991 in words is "one hundred two trillion, twenty-two billion, one hundred eleven million, nine thousand, nine hundred ninety-one".