113221311131 has 4 divisors (see below), whose sum is σ = 113229171264. Its totient is φ = 113213451000.

The previous prime is 113221311127. The next prime is 113221311143. The reversal of 113221311131 is 131113122311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131113122311 = 113023 ⋅1160057.

It is a cyclic number.

It is not a de Polignac number, because 113221311131 - 2² = 113221311127 is a prime.

It is a super-2 number, since 2×113221311131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113221341131) 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 3 ways as a sum of consecutive naturals, for example, 3908420 + ... + 3937281.

It is an arithmetic number, because the mean of its divisors is an integer number (28307292816).

Almost surely, 2^113221311131 is an apocalyptic number.

113221311131 is a deficient number, since it is larger than the sum of its proper divisors (7860133).

113221311131 is an equidigital number, since it uses as much as digits as its factorization.

113221311131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7860132.

The product of its digits is 108, while the sum is 20.

Adding to 113221311131 its reverse (131113122311), we get a palindrome (244334433442).

The spelling of 113221311131 in words is "one hundred thirteen billion, two hundred twenty-one million, three hundred eleven thousand, one hundred thirty-one".