211882079561 has 2 divisors, whose sum is σ = 211882079562. Its totient is φ = 211882079560.

The previous prime is 211882079527. The next prime is 211882079579. The reversal of 211882079561 is 165970288112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200586641161 + 11295438400 = 447869^2 + 106280^2 .

It is a cyclic number.

It is not a de Polignac number, because 211882079561 - 2³⁰ = 210808337737 is a prime.

It is not a weakly prime, because it can be changed into another prime (211882069561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105941039780 + 105941039781.

It is an arithmetic number, because the mean of its divisors is an integer number (105941039781).

Almost surely, 2^211882079561 is an apocalyptic number.

It is an amenable number.

211882079561 is a deficient number, since it is larger than the sum of its proper divisors (1).

211882079561 is an equidigital number, since it uses as much as digits as its factorization.

211882079561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 50.

The spelling of 211882079561 in words is "two hundred eleven billion, eight hundred eighty-two million, seventy-nine thousand, five hundred sixty-one".