102120312431 has 4 divisors (see below), whose sum is σ = 102126478272. Its totient is φ = 102114146592.

The previous prime is 102120312403. The next prime is 102120312433. The reversal of 102120312431 is 134213021201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102120312431 - 2⁶ = 102120312367 is a prime.

It is a super-2 number, since 2×102120312431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120312433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3058010 + ... + 3091223.

It is an arithmetic number, because the mean of its divisors is an integer number (25531619568).

Almost surely, 2^102120312431 is an apocalyptic number.

102120312431 is a deficient number, since it is larger than the sum of its proper divisors (6165841).

102120312431 is an equidigital number, since it uses as much as digits as its factorization.

102120312431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6165840.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 102120312431 its reverse (134213021201), we get a palindrome (236333333632).

The spelling of 102120312431 in words is "one hundred two billion, one hundred twenty million, three hundred twelve thousand, four hundred thirty-one".