100031031020 has 48 divisors (see below), whose sum is σ = 210726079200. Its totient is φ = 39886648320.

The previous prime is 100031031017. The next prime is 100031031059. The reversal of 100031031020 is 20130130001.

It is a junction number, because it is equal to n+sod(n) for n = 100031030992 and 100031031010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21929540 + ... + 21934100.

It is an arithmetic number, because the mean of its divisors is an integer number (4390126650).

Almost surely, 2^100031031020 is an apocalyptic number.

100031031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100031031020 is an abundant number, since it is smaller than the sum of its proper divisors (110695048180).

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

100031031020 is a wasteful number, since it uses less digits than its factorization.

100031031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7778 (or 7776 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 100031031020 its reverse (20130130001), we get a palindrome (120161161021).

The spelling of 100031031020 in words is "one hundred billion, thirty-one million, thirty-one thousand, twenty".