31100020103100 has 72 divisors (see below), whose sum is σ = 96904472907760. Its totient is φ = 7655389562880.

The previous prime is 31100020103071. The next prime is 31100020103161. The reversal of 31100020103100 is 130102000113.

It is a super-2 number, since 2×31100020103100² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3987178165 + ... + 3987185964.

Almost surely, 2^{31100020103100} is an apocalyptic number.

31100020103100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31100020103100 is an abundant number, since it is smaller than the sum of its proper divisors (65804452804660).

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

31100020103100 is a wasteful number, since it uses less digits than its factorization.

31100020103100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7974364159 (or 7974364152 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 31100020103100 its reverse (130102000113), we get a palindrome (31230122103213).

The spelling of 31100020103100 in words is "thirty-one trillion, one hundred billion, twenty million, one hundred three thousand, one hundred".