113138221 has 8 divisors (see below), whose sum is σ = 129428480. Its totient is φ = 96879888.

The previous prime is 113138197. The next prime is 113138237. The reversal of 113138221 is 122831311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-113138221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113138192 and 113138201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113138261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175 + ... + 15043.

It is an arithmetic number, because the mean of its divisors is an integer number (16178560).

Almost surely, 2^113138221 is an apocalyptic number.

It is an amenable number.

113138221 is a deficient number, since it is larger than the sum of its proper divisors (16290259).

113138221 is a wasteful number, since it uses less digits than its factorization.

113138221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15963.

The product of its digits is 288, while the sum is 22.

The square root of 113138221 is about 10636.6451947971. The cubic root of 113138221 is about 483.6558538107.

Adding to 113138221 its reverse (122831311), we get a palindrome (235969532).

The spelling of 113138221 in words is "one hundred thirteen million, one hundred thirty-eight thousand, two hundred twenty-one".