113006561221 has 4 divisors (see below), whose sum is σ = 113011358944. Its totient is φ = 113001763500.

The previous prime is 113006561219. The next prime is 113006561341. The reversal of 113006561221 is 122165600311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 113006561221 - 2¹ = 113006561219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113006561221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113006561201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2363355 + ... + 2410696.

It is an arithmetic number, because the mean of its divisors is an integer number (28252839736).

Almost surely, 2^113006561221 is an apocalyptic number.

It is an amenable number.

113006561221 is a deficient number, since it is larger than the sum of its proper divisors (4797723).

113006561221 is an equidigital number, since it uses as much as digits as its factorization.

113006561221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797722.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 113006561221 in words is "one hundred thirteen billion, six million, five hundred sixty-one thousand, two hundred twenty-one".