102120120231 has 24 divisors (see below), whose sum is σ = 139816525680. Its totient is φ = 66298288896.

The previous prime is 102120120163. The next prime is 102120120251. The reversal of 102120120231 is 132021021201.

It is not a de Polignac number, because 102120120231 - 2¹¹ = 102120118183 is a prime.

It is a super-2 number, since 2×102120120231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102120120231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120120251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1842025 + ... + 1896653.

It is an arithmetic number, because the mean of its divisors is an integer number (5825688570).

Almost surely, 2^102120120231 is an apocalyptic number.

102120120231 is a deficient number, since it is larger than the sum of its proper divisors (37696405449).

102120120231 is an equidigital number, since it uses as much as digits as its factorization.

102120120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55055 (or 55012 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 102120120231 its reverse (132021021201), we get a palindrome (234141141432).

The spelling of 102120120231 in words is "one hundred two billion, one hundred twenty million, one hundred twenty thousand, two hundred thirty-one".