102120898931 has 2 divisors, whose sum is σ = 102120898932. Its totient is φ = 102120898930.

The previous prime is 102120898837. The next prime is 102120898937. The reversal of 102120898931 is 139898021201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102120898931 is a prime.

It is a super-2 number, since 2×102120898931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102120898937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060449465 + 51060449466.

It is an arithmetic number, because the mean of its divisors is an integer number (51060449466).

Almost surely, 2^102120898931 is an apocalyptic number.

102120898931 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120898931 is an equidigital number, since it uses as much as digits as its factorization.

102120898931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 44.

The spelling of 102120898931 in words is "one hundred two billion, one hundred twenty million, eight hundred ninety-eight thousand, nine hundred thirty-one".