211702455161 has 2 divisors, whose sum is σ = 211702455162. Its totient is φ = 211702455160.

The previous prime is 211702455079. The next prime is 211702455193. The reversal of 211702455161 is 161554207112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204701953600 + 7000501561 = 452440^2 + 83669^2 .

It is a cyclic number.

It is not a de Polignac number, because 211702455161 - 2¹⁰ = 211702454137 is a prime.

It is not a weakly prime, because it can be changed into another prime (211702415161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105851227580 + 105851227581.

It is an arithmetic number, because the mean of its divisors is an integer number (105851227581).

Almost surely, 2^211702455161 is an apocalyptic number.

It is an amenable number.

211702455161 is a deficient number, since it is larger than the sum of its proper divisors (1).

211702455161 is an equidigital number, since it uses as much as digits as its factorization.

211702455161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 35.

The spelling of 211702455161 in words is "two hundred eleven billion, seven hundred two million, four hundred fifty-five thousand, one hundred sixty-one".