31102012100 has 36 divisors (see below), whose sum is σ = 68187174804. Its totient is φ = 12312545280.

The previous prime is 31102012087. The next prime is 31102012121. The reversal of 31102012100 is 121020113.

It can be written as a sum of positive squares in 6 ways, for example, as 1037226436 + 30064785664 = 32206^2 + 173392^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1593497 + ... + 1612896.

It is an arithmetic number, because the mean of its divisors is an integer number (1894088189).

Almost surely, 2^31102012100 is an apocalyptic number.

It is an amenable number.

31102012100 is an abundant number, since it is smaller than the sum of its proper divisors (37085162704).

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

31102012100 is a wasteful number, since it uses less digits than its factorization.

31102012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206504 (or 3206497 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 31102012100 its reverse (121020113), we get a palindrome (31223032213).

The spelling of 31102012100 in words is "thirty-one billion, one hundred two million, twelve thousand, one hundred".