31212013133300 has 36 divisors (see below), whose sum is σ = 67796929596396. Its totient is φ = 12472480627200.

The previous prime is 31212013133227. The next prime is 31212013133339. The reversal of 31212013133300 is 333131021213.

It can be written as a sum of positive squares in 6 ways, for example, as 1013493212176 + 30198519921124 = 1006724^2 + 5495318^2 .

It is a congruent number.

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, 153956021 + ... + 154158620.

Almost surely, 2^{31212013133300} is an apocalyptic number.

It is an amenable number.

31212013133300 is an abundant number, since it is smaller than the sum of its proper divisors (36584916463096).

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

31212013133300 is a wasteful number, since it uses less digits than its factorization.

31212013133300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308115668 (or 308115661 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31212013133300 its reverse (333131021213), we get a palindrome (31545144154513).

The spelling of 31212013133300 in words is "thirty-one trillion, two hundred twelve billion, thirteen million, one hundred thirty-three thousand, three hundred".