3121402313 has 2 divisors, whose sum is σ = 3121402314. Its totient is φ = 3121402312.

The previous prime is 3121402309. The next prime is 3121402321. The reversal of 3121402313 is 3132041213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3006548224 + 114854089 = 54832^2 + 10717^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121402313 - 2² = 3121402309 is a prime.

It is not a weakly prime, because it can be changed into another prime (3121402343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560701156 + 1560701157.

It is an arithmetic number, because the mean of its divisors is an integer number (1560701157).

Almost surely, 2^3121402313 is an apocalyptic number.

It is an amenable number.

3121402313 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121402313 is an equidigital number, since it uses as much as digits as its factorization.

3121402313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 3121402313 is about 55869.5114798760. The cubic root of 3121402313 is about 1461.4476029647.

Adding to 3121402313 its reverse (3132041213), we get a palindrome (6253443526).

The spelling of 3121402313 in words is "three billion, one hundred twenty-one million, four hundred two thousand, three hundred thirteen".