31113220100 has 72 divisors (see below), whose sum is σ = 74159211840. Its totient is φ = 11277636480.

The previous prime is 31113220097. The next prime is 31113220109. The reversal of 31113220100 is 102231113.

It is not an unprimeable number, because it can be changed into a prime (31113220109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312287 + ... + 399686.

Almost surely, 2^31113220100 is an apocalyptic number.

It is an amenable number.

31113220100 is an abundant number, since it is smaller than the sum of its proper divisors (43045991740).

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

31113220100 is a wasteful number, since it uses less digits than its factorization.

31113220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712029 (or 712022 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31113220100 its reverse (102231113), we get a palindrome (31215451213).

The spelling of 31113220100 in words is "thirty-one billion, one hundred thirteen million, two hundred twenty thousand, one hundred".