102321231020 has 12 divisors (see below), whose sum is σ = 214874585184. Its totient is φ = 40928492400.

The previous prime is 102321231013. The next prime is 102321231037. The reversal of 102321231020 is 20132123201.

It is a self number, because there is not a number n which added to its sum of digits gives 102321231020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2558030756 + ... + 2558030795.

It is an arithmetic number, because the mean of its divisors is an integer number (17906215432).

Almost surely, 2^102321231020 is an apocalyptic number.

102321231020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102321231020 is an abundant number, since it is smaller than the sum of its proper divisors (112553354164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102321231020 is a wasteful number, since it uses less digits than its factorization.

102321231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116061560 (or 5116061558 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 102321231020 its reverse (20132123201), we get a palindrome (122453354221).

The spelling of 102321231020 in words is "one hundred two billion, three hundred twenty-one million, two hundred thirty-one thousand, twenty".