21332119958857 has 2 divisors, whose sum is σ = 21332119958858. Its totient is φ = 21332119958856.

The previous prime is 21332119958843. The next prime is 21332119959053. The reversal of 21332119958857 is 75885991123312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16605861350841 + 4726258608016 = 4075029^2 + 2173996^2 .

It is a cyclic number.

It is not a de Polignac number, because 21332119958857 - 2³⁵ = 21297760220489 is a prime.

It is not a weakly prime, because it can be changed into another prime (21332119958837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666059979428 + 10666059979429.

It is an arithmetic number, because the mean of its divisors is an integer number (10666059979429).

Almost surely, 2^{21332119958857} is an apocalyptic number.

It is an amenable number.

21332119958857 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332119958857 is an equidigital number, since it uses as much as digits as its factorization.

21332119958857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32659200, while the sum is 64.

The spelling of 21332119958857 in words is "twenty-one trillion, three hundred thirty-two billion, one hundred nineteen million, nine hundred fifty-eight thousand, eight hundred fifty-seven".