31323012212200 has 24 divisors (see below), whose sum is σ = 72826003393830. Its totient is φ = 12529204884800.

The previous prime is 31323012212197. The next prime is 31323012212213. The reversal of 31323012212200 is 221221032313.

It can be written as a sum of positive squares in 3 ways, for example, as 24404607770404 + 6918404441796 = 4940102^2 + 2630286^2 .

It is a super-2 number, since 2×31323012212200² (a number of 28 digits) contains 22 as substring.

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, 78307530331 + ... + 78307530730.

Almost surely, 2^{31323012212200} is an apocalyptic number.

It is an amenable number.

31323012212200 is an abundant number, since it is smaller than the sum of its proper divisors (41502991181630).

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

31323012212200 is a wasteful number, since it uses less digits than its factorization.

31323012212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156615061077 (or 156615061068 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31323012212200 its reverse (221221032313), we get a palindrome (31544233244513).

The spelling of 31323012212200 in words is "thirty-one trillion, three hundred twenty-three billion, twelve million, two hundred twelve thousand, two hundred".