113131222031 has 8 divisors (see below), whose sum is σ = 113654661120. Its totient is φ = 112607927352.

The previous prime is 113131222021. The next prime is 113131222063. The reversal of 113131222031 is 130222131311.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113131222031 is a prime.

It is a super-2 number, since 2×113131222031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113131221994 and 113131222012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113131222021) 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 7 ways as a sum of consecutive naturals, for example, 1733906 + ... + 1797968.

It is an arithmetic number, because the mean of its divisors is an integer number (14206832640).

Almost surely, 2^113131222031 is an apocalyptic number.

113131222031 is a deficient number, since it is larger than the sum of its proper divisors (523439089).

113131222031 is an equidigital number, since it uses as much as digits as its factorization.

113131222031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72205.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 113131222031 its reverse (130222131311), we get a palindrome (243353353342).

The spelling of 113131222031 in words is "one hundred thirteen billion, one hundred thirty-one million, two hundred twenty-two thousand, thirty-one".