113564421209 has 2 divisors, whose sum is σ = 113564421210. Its totient is φ = 113564421208.

The previous prime is 113564421169. The next prime is 113564421239. The reversal of 113564421209 is 902124465311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73412276809 + 40152144400 = 270947^2 + 200380^2 .

It is a cyclic number.

It is not a de Polignac number, because 113564421209 - 2²⁰ = 113563372633 is a prime.

It is not a weakly prime, because it can be changed into another prime (113564421239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56782210604 + 56782210605.

It is an arithmetic number, because the mean of its divisors is an integer number (56782210605).

Almost surely, 2^113564421209 is an apocalyptic number.

It is an amenable number.

113564421209 is a deficient number, since it is larger than the sum of its proper divisors (1).

113564421209 is an equidigital number, since it uses as much as digits as its factorization.

113564421209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 113564421209 in words is "one hundred thirteen billion, five hundred sixty-four million, four hundred twenty-one thousand, two hundred nine".