31321213300 has 36 divisors (see below), whose sum is σ = 73195269196. Its totient is φ = 11564755200.

The previous prime is 31321213291. The next prime is 31321213307. The reversal of 31321213300 is 331212313.

It can be written as a sum of positive squares in 6 ways, for example, as 946300644 + 30374912656 = 30762^2 + 174284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321213307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12045321 + ... + 12047920.

Almost surely, 2^31321213300 is an apocalyptic number.

It is an amenable number.

31321213300 is an abundant number, since it is smaller than the sum of its proper divisors (41874055896).

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

31321213300 is a wasteful number, since it uses less digits than its factorization.

31321213300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24093268 (or 24093261 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31321213300 its reverse (331212313), we get a palindrome (31652425613).

The spelling of 31321213300 in words is "thirty-one billion, three hundred twenty-one million, two hundred thirteen thousand, three hundred".