211122110957 has 2 divisors, whose sum is σ = 211122110958. Its totient is φ = 211122110956.

The previous prime is 211122110923. The next prime is 211122110971. The reversal of 211122110957 is 759011221112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211029065641 + 93045316 = 459379^2 + 9646^2 .

It is a cyclic number.

It is not a de Polignac number, because 211122110957 - 2⁸ = 211122110701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211122110977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105561055478 + 105561055479.

It is an arithmetic number, because the mean of its divisors is an integer number (105561055479).

Almost surely, 2^211122110957 is an apocalyptic number.

It is an amenable number.

211122110957 is a deficient number, since it is larger than the sum of its proper divisors (1).

211122110957 is an equidigital number, since it uses as much as digits as its factorization.

211122110957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 32.

The spelling of 211122110957 in words is "two hundred eleven billion, one hundred twenty-two million, one hundred ten thousand, nine hundred fifty-seven".