3111213221220 has 48 divisors (see below), whose sum is σ = 9381504484800. Its totient is φ = 765837100416.

The previous prime is 3111213221183. The next prime is 3111213221227. The reversal of 3111213221220 is 221223121113.

It is not an unprimeable number, because it can be changed into a prime (3111213221227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1994366670 + ... + 1994368229.

It is an arithmetic number, because the mean of its divisors is an integer number (195448010100).

Almost surely, 2^{3111213221220} is an apocalyptic number.

3111213221220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3111213221220 is an abundant number, since it is smaller than the sum of its proper divisors (6270291263580).

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

3111213221220 is a wasteful number, since it uses less digits than its factorization.

3111213221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988734924 (or 3988734922 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 3111213221220 its reverse (221223121113), we get a palindrome (3332436342333).

The spelling of 3111213221220 in words is "three trillion, one hundred eleven billion, two hundred thirteen million, two hundred twenty-one thousand, two hundred twenty".