31213130222112 has 48 divisors (see below), whose sum is σ = 81935027883072. Its totient is φ = 10404305496320.

The previous prime is 31213130222059. The next prime is 31213130222117. The reversal of 31213130222112 is 21122203131213.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (31213130222117) 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 7 ways as a sum of consecutive naturals, for example, 14049562 + ... + 16118822.

It is an arithmetic number, because the mean of its divisors is an integer number (1706979747564).

Almost surely, 2^{31213130222112} is an apocalyptic number.

31213130222112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31213130222112 is an abundant number, since it is smaller than the sum of its proper divisors (50721897660960).

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

31213130222112 is a wasteful number, since it uses less digits than its factorization.

31213130222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226401 (or 2226393 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 31213130222112 its reverse (21122203131213), we get a palindrome (52335333353325).

The spelling of 31213130222112 in words is "thirty-one trillion, two hundred thirteen billion, one hundred thirty million, two hundred twenty-two thousand, one hundred twelve".