102210000111991 has 2 divisors, whose sum is σ = 102210000111992. Its totient is φ = 102210000111990.

The previous prime is 102210000111871. The next prime is 102210000112021. The reversal of 102210000111991 is 199111000012201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102210000111991 - 2¹⁵ = 102210000079223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102210000114991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51105000055995 + 51105000055996.

It is an arithmetic number, because the mean of its divisors is an integer number (51105000055996).

Almost surely, 2^{102210000111991} is an apocalyptic number.

102210000111991 is a deficient number, since it is larger than the sum of its proper divisors (1).

102210000111991 is an equidigital number, since it uses as much as digits as its factorization.

102210000111991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 102210000111991 in words is "one hundred two trillion, two hundred ten billion, one hundred eleven thousand, nine hundred ninety-one".