3121320123 has 16 divisors (see below), whose sum is σ = 4634098560. Its totient is φ = 2076415848.

The previous prime is 3121320113. The next prime is 3121320187. The reversal of 3121320123 is 3210231213.

3121320123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3121320123 - 2⁵ = 3121320091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3121320096 and 3121320105.

It is not an unprimeable number, because it can be changed into a prime (3121320113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111165 + ... + 136382.

It is an arithmetic number, because the mean of its divisors is an integer number (289631160).

Almost surely, 2^3121320123 is an apocalyptic number.

3121320123 is a deficient number, since it is larger than the sum of its proper divisors (1512778437).

3121320123 is a wasteful number, since it uses less digits than its factorization.

3121320123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248023 (or 248017 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3121320123 is about 55868.7759217973. The cubic root of 3121320123 is about 1461.4347756710.

Adding to 3121320123 its reverse (3210231213), we get a palindrome (6331551336).

The spelling of 3121320123 in words is "three billion, one hundred twenty-one million, three hundred twenty thousand, one hundred twenty-three".