3121105457 has 2 divisors, whose sum is σ = 3121105458. Its totient is φ = 3121105456.

The previous prime is 3121105447. The next prime is 3121105469. The reversal of 3121105457 is 7545011213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2152588816 + 968516641 = 46396^2 + 31121^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121105457 - 2⁸ = 3121105201 is a prime.

It is not a weakly prime, because it can be changed into another prime (3121105417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560552728 + 1560552729.

It is an arithmetic number, because the mean of its divisors is an integer number (1560552729).

Almost surely, 2^3121105457 is an apocalyptic number.

It is an amenable number.

3121105457 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121105457 is an equidigital number, since it uses as much as digits as its factorization.

3121105457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 3121105457 is about 55866.8547262149. The cubic root of 3121105457 is about 1461.4012719463.

The spelling of 3121105457 in words is "three billion, one hundred twenty-one million, one hundred five thousand, four hundred fifty-seven".