102112021951 has 2 divisors, whose sum is σ = 102112021952. Its totient is φ = 102112021950.

The previous prime is 102112021909. The next prime is 102112022029. The reversal of 102112021951 is 159120211201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102112021951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102112021351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51056010975 + 51056010976.

It is an arithmetic number, because the mean of its divisors is an integer number (51056010976).

Almost surely, 2^102112021951 is an apocalyptic number.

102112021951 is a deficient number, since it is larger than the sum of its proper divisors (1).

102112021951 is an equidigital number, since it uses as much as digits as its factorization.

102112021951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 25.

The spelling of 102112021951 in words is "one hundred two billion, one hundred twelve million, twenty-one thousand, nine hundred fifty-one".