113112221 has 4 divisors (see below), whose sum is σ = 115518912. Its totient is φ = 110705532.

The previous prime is 113112199. The next prime is 113112283. The reversal of 113112221 is 122211311.

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 113112221 - 2¹⁰ = 113111197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 113112196 and 113112205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113112421) 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, 1203275 + ... + 1203368.

It is an arithmetic number, because the mean of its divisors is an integer number (28879728).

Almost surely, 2^113112221 is an apocalyptic number.

It is an amenable number.

113112221 is a deficient number, since it is larger than the sum of its proper divisors (2406691).

113112221 is an equidigital number, since it uses as much as digits as its factorization.

113112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406690.

The product of its digits is 24, while the sum is 14.

The square root of 113112221 is about 10635.4229347027. The cubic root of 113112221 is about 483.6188017414.

Adding to 113112221 its reverse (122211311), we get a palindrome (235323532).

The spelling of 113112221 in words is "one hundred thirteen million, one hundred twelve thousand, two hundred twenty-one".