3120021313 has 4 divisors (see below), whose sum is σ = 3120443568. Its totient is φ = 3119599060.

The previous prime is 3120021287. The next prime is 3120021379. The reversal of 3120021313 is 3131200213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3120021313 - 2²⁵ = 3086466881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3120021413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199843 + ... + 214888.

It is an arithmetic number, because the mean of its divisors is an integer number (780110892).

Almost surely, 2^3120021313 is an apocalyptic number.

It is an amenable number.

3120021313 is a deficient number, since it is larger than the sum of its proper divisors (422255).

3120021313 is an equidigital number, since it uses as much as digits as its factorization.

3120021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422254.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 3120021313 is about 55857.1509567038. The cubic root of 3120021313 is about 1461.2320420665.

Adding to 3120021313 its reverse (3131200213), we get a palindrome (6251221526).

The spelling of 3120021313 in words is "three billion, one hundred twenty million, twenty-one thousand, three hundred thirteen".