100031331020 has 24 divisors (see below), whose sum is σ = 212724859200. Its totient is φ = 39506044032.

The previous prime is 100031331017. The next prime is 100031331079. The reversal of 100031331020 is 20133130001.

It is a junction number, because it is equal to n+sod(n) for n = 100031330986 and 100031331004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31653905 + ... + 31657064.

It is an arithmetic number, because the mean of its divisors is an integer number (8863535800).

Almost surely, 2^100031331020 is an apocalyptic number.

100031331020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100031331020 is an abundant number, since it is smaller than the sum of its proper divisors (112693528180).

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

100031331020 is a wasteful number, since it uses less digits than its factorization.

100031331020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63311057 (or 63311055 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 100031331020 its reverse (20133130001), we get a palindrome (120164461021).

The spelling of 100031331020 in words is "one hundred billion, thirty-one million, three hundred thirty-one thousand, twenty".