113120031 has 4 divisors (see below), whose sum is σ = 150826712. Its totient is φ = 75413352.

The previous prime is 113120027. The next prime is 113120069. The reversal of 113120031 is 130021311.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 113120031 - 2² = 113120027 is a prime.

It is a super-2 number, since 2×113120031² = 25592282826881922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113119989 and 113120016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113120011) 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, 18853336 + ... + 18853341.

It is an arithmetic number, because the mean of its divisors is an integer number (37706678).

Almost surely, 2^113120031 is an apocalyptic number.

113120031 is a deficient number, since it is larger than the sum of its proper divisors (37706681).

113120031 is an equidigital number, since it uses as much as digits as its factorization.

113120031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37706680.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 113120031 is about 10635.7900975903. The cubic root of 113120031 is about 483.6299322095.

Adding to 113120031 its reverse (130021311), we get a palindrome (243141342).

The spelling of 113120031 in words is "one hundred thirteen million, one hundred twenty thousand, thirty-one".