3121403320 has 64 divisors (see below), whose sum is σ = 8498623680. Its totient is φ = 1007241216.

The previous prime is 3121403309. The next prime is 3121403377. The reversal of 3121403320 is 233041213.

3121403320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3121403320² = 19486317372214044800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323119 + ... + 332638.

It is an arithmetic number, because the mean of its divisors is an integer number (132790995).

Almost surely, 2^3121403320 is an apocalyptic number.

It is an amenable number.

3121403320 is an abundant number, since it is smaller than the sum of its proper divisors (5377220360).

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

3121403320 is a wasteful number, since it uses less digits than its factorization.

3121403320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655792 (or 655788 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 3121403320 is about 55869.5204919462. The cubic root of 3121403320 is about 1461.4477601245.

Adding to 3121403320 its reverse (233041213), we get a palindrome (3354444533).

The spelling of 3121403320 in words is "three billion, one hundred twenty-one million, four hundred three thousand, three hundred twenty".