3121020313 has 8 divisors (see below), whose sum is σ = 3286440000. Its totient is φ = 2955716208.

The previous prime is 3121020307. The next prime is 3121020347. The reversal of 3121020313 is 3130201213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3121020313 - 2¹³ = 3121012121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121020913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29595 + ... + 84367.

It is an arithmetic number, because the mean of its divisors is an integer number (410805000).

Almost surely, 2^3121020313 is an apocalyptic number.

It is an amenable number.

3121020313 is a deficient number, since it is larger than the sum of its proper divisors (165419687).

3121020313 is a wasteful number, since it uses less digits than its factorization.

3121020313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57791.

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

The square root of 3121020313 is about 55866.0926949433. The cubic root of 3121020313 is about 1461.3879827786.

Adding to 3121020313 its reverse (3130201213), we get a palindrome (6251221526).

Subtracting 3121020313 from its reverse (3130201213), we obtain a square (9180900 = 3030²).

The spelling of 3121020313 in words is "three billion, one hundred twenty-one million, twenty thousand, three hundred thirteen".