31220255331120 has 80 divisors (see below), whose sum is σ = 96796898744832. Its totient is φ = 8324187897600.

The previous prime is 31220255331119. The next prime is 31220255331131. The reversal of 31220255331120 is 2113355202213.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 7830106 + ... + 11124345.

Almost surely, 2^{31220255331120} is an apocalyptic number.

31220255331120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31220255331120 is an abundant number, since it is smaller than the sum of its proper divisors (65576643413712).

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

31220255331120 is a wasteful number, since it uses less digits than its factorization.

31220255331120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18961330 (or 18961324 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 31220255331120 in words is "thirty-one trillion, two hundred twenty billion, two hundred fifty-five million, three hundred thirty-one thousand, one hundred twenty".