31220113213200 has 120 divisors (see below), whose sum is σ = 102711359994688. Its totient is φ = 8100353687040.

The previous prime is 31220113213087. The next prime is 31220113213231. The reversal of 31220113213200 is 231231102213.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351533452 + ... + 351622251.

Almost surely, 2^{31220113213200} is an apocalyptic number.

31220113213200 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31220113213200 is an abundant number, since it is smaller than the sum of its proper divisors (71491246781488).

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

31220113213200 is a wasteful number, since it uses less digits than its factorization.

31220113213200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703155761 (or 703155750 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31220113213200 its reverse (231231102213), we get a palindrome (31451344315413).

The spelling of 31220113213200 in words is "thirty-one trillion, two hundred twenty billion, one hundred thirteen million, two hundred thirteen thousand, two hundred".