31011321312200 has 24 divisors (see below), whose sum is σ = 72101322051330. Its totient is φ = 12404528524800.

The previous prime is 31011321312163. The next prime is 31011321312241. The reversal of 31011321312200 is 221312311013.

It is a happy number.

31011321312200 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 26292425332996 + 4718895979204 = 5127614^2 + 2172302^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77528303081 + ... + 77528303480.

Almost surely, 2^{31011321312200} is an apocalyptic number.

It is an amenable number.

31011321312200 is an abundant number, since it is smaller than the sum of its proper divisors (41090000739130).

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

31011321312200 is a wasteful number, since it uses less digits than its factorization.

31011321312200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155056606577 (or 155056606568 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31011321312200 its reverse (221312311013), we get a palindrome (31232633623213).

The spelling of 31011321312200 in words is "thirty-one trillion, eleven billion, three hundred twenty-one million, three hundred twelve thousand, two hundred".