3121310120 has 32 divisors (see below), whose sum is σ = 7392578400. Its totient is φ = 1182811968.

The previous prime is 3121310119. The next prime is 3121310131. The reversal of 3121310120 is 210131213.

It is a junction number, because it is equal to n+sod(n) for n = 3121310095 and 3121310104.

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, 2052734 + ... + 2054253.

It is an arithmetic number, because the mean of its divisors is an integer number (231018075).

Almost surely, 2^3121310120 is an apocalyptic number.

It is an amenable number.

3121310120 is an abundant number, since it is smaller than the sum of its proper divisors (4271268280).

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

3121310120 is a wasteful number, since it uses less digits than its factorization.

3121310120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107017 (or 4107013 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 3121310120 is about 55868.6863994492. The cubic root of 3121310120 is about 1461.4332144995.

Adding to 3121310120 its reverse (210131213), we get a palindrome (3331441333).

The spelling of 3121310120 in words is "three billion, one hundred twenty-one million, three hundred ten thousand, one hundred twenty".