113220131 has 4 divisors (see below), whose sum is σ = 113265552. Its totient is φ = 113174712.

The previous prime is 113220127. The next prime is 113220139. The reversal of 113220131 is 131022311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131022311 = 7 ⋅18717473.

It is a cyclic number.

It is not a de Polignac number, because 113220131 - 2² = 113220127 is a prime.

It is a super-2 number, since 2×113220131² = 25637596127314322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113220139) 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, 18740 + ... + 24033.

It is an arithmetic number, because the mean of its divisors is an integer number (28316388).

Almost surely, 2^113220131 is an apocalyptic number.

113220131 is a deficient number, since it is larger than the sum of its proper divisors (45421).

113220131 is an equidigital number, since it uses as much as digits as its factorization.

113220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45420.

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

The square root of 113220131 is about 10640.4948663114. The cubic root of 113220131 is about 483.7725449813.

Adding to 113220131 its reverse (131022311), we get a palindrome (244242442).

The spelling of 113220131 in words is "one hundred thirteen million, two hundred twenty thousand, one hundred thirty-one".