2120210131957 has 2 divisors, whose sum is σ = 2120210131958. Its totient is φ = 2120210131956.

The previous prime is 2120210131951. The next prime is 2120210131999. The reversal of 2120210131957 is 7591310120212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2108881935601 + 11328196356 = 1452199^2 + 106434^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120210131957 - 2¹¹ = 2120210129909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120210131951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060105065978 + 1060105065979.

It is an arithmetic number, because the mean of its divisors is an integer number (1060105065979).

Almost surely, 2^{2120210131957} is an apocalyptic number.

It is an amenable number.

2120210131957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120210131957 is an equidigital number, since it uses as much as digits as its factorization.

2120210131957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 34.

The spelling of 2120210131957 in words is "two trillion, one hundred twenty billion, two hundred ten million, one hundred thirty-one thousand, nine hundred fifty-seven".