111239592661 has 2 divisors, whose sum is σ = 111239592662. Its totient is φ = 111239592660.

The previous prime is 111239592641. The next prime is 111239592689. The reversal of 111239592661 is 166295932111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106279912036 + 4959680625 = 326006^2 + 70425^2 .

It is a cyclic number.

It is not a de Polignac number, because 111239592661 - 2²⁹ = 110702721749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111239592601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55619796330 + 55619796331.

It is an arithmetic number, because the mean of its divisors is an integer number (55619796331).

Almost surely, 2^111239592661 is an apocalyptic number.

It is an amenable number.

111239592661 is a deficient number, since it is larger than the sum of its proper divisors (1).

111239592661 is an equidigital number, since it uses as much as digits as its factorization.

111239592661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 46.

The spelling of 111239592661 in words is "one hundred eleven billion, two hundred thirty-nine million, five hundred ninety-two thousand, six hundred sixty-one".