213113212957 has 2 divisors, whose sum is σ = 213113212958. Its totient is φ = 213113212956.

The previous prime is 213113212909. The next prime is 213113212973. The reversal of 213113212957 is 759212311312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212169863161 + 943349796 = 460619^2 + 30714^2 .

It is a cyclic number.

It is not a de Polignac number, because 213113212957 - 2³⁵ = 178753474589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213113212357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106556606478 + 106556606479.

It is an arithmetic number, because the mean of its divisors is an integer number (106556606479).

Almost surely, 2^213113212957 is an apocalyptic number.

It is an amenable number.

213113212957 is a deficient number, since it is larger than the sum of its proper divisors (1).

213113212957 is an equidigital number, since it uses as much as digits as its factorization.

213113212957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The spelling of 213113212957 in words is "two hundred thirteen billion, one hundred thirteen million, two hundred twelve thousand, nine hundred fifty-seven".