31212112131330 has 32 divisors (see below), whose sum is σ = 80671305201984. Its totient is φ = 7682981447616.

The previous prime is 31212112131323. The next prime is 31212112131359. The reversal of 31212112131330 is 3313121121213.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31212112131330.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40015527984 + ... + 40015528763.

It is an arithmetic number, because the mean of its divisors is an integer number (2520978287562).

Almost surely, 2^{31212112131330} is an apocalyptic number.

31212112131330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31212112131330 is an abundant number, since it is smaller than the sum of its proper divisors (49459193070654).

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

31212112131330 is a wasteful number, since it uses less digits than its factorization.

31212112131330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80031056770.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 31212112131330 its reverse (3313121121213), we get a palindrome (34525233252543).

The spelling of 31212112131330 in words is "thirty-one trillion, two hundred twelve billion, one hundred twelve million, one hundred thirty-one thousand, three hundred thirty".