211122157 has 2 divisors, whose sum is σ = 211122158. Its totient is φ = 211122156.

The previous prime is 211122137. The next prime is 211122211. The reversal of 211122157 is 751221112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120758121 + 90364036 = 10989^2 + 9506^2 .

It is a cyclic number.

It is not a de Polignac number, because 211122157 - 2¹¹ = 211120109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211122137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105561078 + 105561079.

It is an arithmetic number, because the mean of its divisors is an integer number (105561079).

Almost surely, 2^211122157 is an apocalyptic number.

It is an amenable number.

211122157 is a deficient number, since it is larger than the sum of its proper divisors (1).

211122157 is an equidigital number, since it uses as much as digits as its factorization.

211122157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 280, while the sum is 22.

The square root of 211122157 is about 14530.0432552694. The cubic root of 211122157 is about 595.4490473608.

Adding to 211122157 its reverse (751221112), we get a palindrome (962343269).

The spelling of 211122157 in words is "two hundred eleven million, one hundred twenty-two thousand, one hundred fifty-seven".