113221131 has 8 divisors (see below), whose sum is σ = 154643664. Its totient is φ = 73639680.

The previous prime is 113221127. The next prime is 113221181. The reversal of 113221131 is 131122311.

It is a happy number.

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

It is not a de Polignac number, because 113221131 - 2² = 113221127 is a prime.

It is a super-2 number, since 2×113221131² = 25638049009838322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 113221131.

It is not an unprimeable number, because it can be changed into a prime (113221181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460126 + ... + 460371.

It is an arithmetic number, because the mean of its divisors is an integer number (19330458).

Almost surely, 2^113221131 is an apocalyptic number.

113221131 is a deficient number, since it is larger than the sum of its proper divisors (41422533).

113221131 is an equidigital number, since it uses as much as digits as its factorization.

113221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920541.

The product of its digits is 36, while the sum is 15.

The square root of 113221131 is about 10640.5418565034. The cubic root of 113221131 is about 483.7739692602.

Adding to 113221131 its reverse (131122311), we get a palindrome (244343442).

The spelling of 113221131 in words is "one hundred thirteen million, two hundred twenty-one thousand, one hundred thirty-one".