113221031 has 12 divisors (see below), whose sum is σ = 142229136. Its totient is φ = 88223520.

The previous prime is 113221027. The next prime is 113221039. The reversal of 113221031 is 130122311.

It is not a de Polignac number, because 113221031 - 2² = 113221027 is a prime.

It is a super-2 number, since 2×113221031² = 25638003721405922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 113220997 and 113221015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113221039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65990 + ... + 67683.

It is an arithmetic number, because the mean of its divisors is an integer number (11852428).

Almost surely, 2^113221031 is an apocalyptic number.

113221031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

113221031 is a deficient number, since it is larger than the sum of its proper divisors (29008105).

113221031 is a wasteful number, since it uses less digits than its factorization.

113221031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133702 (or 133691 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 113221031 is about 10640.5371574935. The cubic root of 113221031 is about 483.7738268326.

Adding to 113221031 its reverse (130122311), we get a palindrome (243343342).

The spelling of 113221031 in words is "one hundred thirteen million, two hundred twenty-one thousand, thirty-one".