12311020331220 has 48 divisors (see below), whose sum is σ = 37122461308800. Its totient is φ = 3030405004416.

The previous prime is 12311020331189. The next prime is 12311020331257. The reversal of 12311020331220 is 2213302011321.

12311020331220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12311020331220² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 7891678920 + ... + 7891680479.

It is an arithmetic number, because the mean of its divisors is an integer number (773384610600).

Almost surely, 2^{12311020331220} is an apocalyptic number.

12311020331220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311020331220 is an abundant number, since it is smaller than the sum of its proper divisors (24811440977580).

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

12311020331220 is a wasteful number, since it uses less digits than its factorization.

12311020331220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15783359424 (or 15783359422 counting only the distinct ones).

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

Adding to 12311020331220 its reverse (2213302011321), we get a palindrome (14524322342541).

The spelling of 12311020331220 in words is "twelve trillion, three hundred eleven billion, twenty million, three hundred thirty-one thousand, two hundred twenty".