3121000313 has 4 divisors (see below), whose sum is σ = 3125517648. Its totient is φ = 3116482980.

The previous prime is 3121000261. The next prime is 3121000343. The reversal of 3121000313 is 3130001213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3130001213 = 41 ⋅76341493.

It is a cyclic number.

It is not a de Polignac number, because 3121000313 - 2¹² = 3120996217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3121000343) 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, 2257631 + ... + 2259012.

It is an arithmetic number, because the mean of its divisors is an integer number (781379412).

Almost surely, 2^3121000313 is an apocalyptic number.

It is an amenable number.

3121000313 is a deficient number, since it is larger than the sum of its proper divisors (4517335).

3121000313 is an equidigital number, since it uses as much as digits as its factorization.

3121000313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4517334.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 3121000313 is about 55865.9136952042. The cubic root of 3121000313 is about 1461.3848611689.

Adding to 3121000313 its reverse (3130001213), we get a palindrome (6251001526).

The spelling of 3121000313 in words is "three billion, one hundred twenty-one million, three hundred thirteen", and thus it is an aban number.