113204225661 has 4 divisors (see below), whose sum is σ = 150938967552. Its totient is φ = 75469483772.

The previous prime is 113204225657. The next prime is 113204225663. The reversal of 113204225661 is 166522402311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 166522402311 = 3 ⋅55507467437.

It is a cyclic number.

It is not a de Polignac number, because 113204225661 - 2² = 113204225657 is a prime.

It is a super-2 number, since 2×113204225661² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113204225663) 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, 18867370941 + ... + 18867370946.

It is an arithmetic number, because the mean of its divisors is an integer number (37734741888).

Almost surely, 2^113204225661 is an apocalyptic number.

It is an amenable number.

113204225661 is a deficient number, since it is larger than the sum of its proper divisors (37734741891).

113204225661 is an equidigital number, since it uses as much as digits as its factorization.

113204225661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37734741890.

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 113204225661 its reverse (166522402311), we get a palindrome (279726627972).

The spelling of 113204225661 in words is "one hundred thirteen billion, two hundred four million, two hundred twenty-five thousand, six hundred sixty-one".