213122223059857 has 2 divisors, whose sum is σ = 213122223059858. Its totient is φ = 213122223059856.

The previous prime is 213122223059821. The next prime is 213122223059861. The reversal of 213122223059857 is 758950322221312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149500287074961 + 63621935984896 = 12227031^2 + 7976336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213122223059857 is a prime.

It is not a weakly prime, because it can be changed into another prime (213122223059807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106561111529928 + 106561111529929.

It is an arithmetic number, because the mean of its divisors is an integer number (106561111529929).

Almost surely, 2^{213122223059857} is an apocalyptic number.

It is an amenable number.

213122223059857 is a deficient number, since it is larger than the sum of its proper divisors (1).

213122223059857 is an equidigital number, since it uses as much as digits as its factorization.

213122223059857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 213122223059857 in words is "two hundred thirteen trillion, one hundred twenty-two billion, two hundred twenty-three million, fifty-nine thousand, eight hundred fifty-seven".