2056120621 has 2 divisors, whose sum is σ = 2056120622. Its totient is φ = 2056120620.

The previous prime is 2056120613. The next prime is 2056120679. The reversal of 2056120621 is 1260216502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2048558121 + 7562500 = 45261^2 + 2750^2 .

It is a cyclic number.

It is not a de Polignac number, because 2056120621 - 2³ = 2056120613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2056120681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028060310 + 1028060311.

It is an arithmetic number, because the mean of its divisors is an integer number (1028060311).

Almost surely, 2^2056120621 is an apocalyptic number.

It is an amenable number.

2056120621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2056120621 is an equidigital number, since it uses as much as digits as its factorization.

2056120621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2056120621 is about 45344.4662665688. The cubic root of 2056120621 is about 1271.5971022431.

The spelling of 2056120621 in words is "two billion, fifty-six million, one hundred twenty thousand, six hundred twenty-one".