3121604123 has 32 divisors (see below), whose sum is σ = 3640412160. Its totient is φ = 2650527360.

The previous prime is 3121604119. The next prime is 3121604159. The reversal of 3121604123 is 3214061213.

It is a cyclic number.

It is not a de Polignac number, because 3121604123 - 2² = 3121604119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3121604113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1012298 + ... + 1015376.

It is an arithmetic number, because the mean of its divisors is an integer number (113762880).

Almost surely, 2^3121604123 is an apocalyptic number.

3121604123 is a deficient number, since it is larger than the sum of its proper divisors (518808037).

3121604123 is a wasteful number, since it uses less digits than its factorization.

3121604123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3227.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 3121604123 is about 55871.3175341337. The cubic root of 3121604123 is about 1461.4790982516.

Adding to 3121604123 its reverse (3214061213), we get a palindrome (6335665336).

The spelling of 3121604123 in words is "three billion, one hundred twenty-one million, six hundred four thousand, one hundred twenty-three".