3121111120 has 40 divisors (see below), whose sum is σ = 7261115616. Its totient is φ = 1247664768.

The previous prime is 3121111111. The next prime is 3121111139. The reversal of 3121111120 is 211111213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 3121111120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126519 + ... + 149161.

Almost surely, 2^3121111120 is an apocalyptic number.

It is an amenable number.

3121111120 is an abundant number, since it is smaller than the sum of its proper divisors (4140004496).

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

3121111120 is a wasteful number, since it uses less digits than its factorization.

3121111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24379 (or 24373 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 3121111120 is about 55866.9054091955. The cubic root of 3121111120 is about 1461.4021558116.

Adding to 3121111120 its reverse (211111213), we get a palindrome (3332222333).

The spelling of 3121111120 in words is "three billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twenty".