113131222010021 has 4 divisors (see below), whose sum is σ = 113136514224972. Its totient is φ = 113125929795072.

The previous prime is 113131222010017. The next prime is 113131222010033. The reversal of 113131222010021 is 120010222131311.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5029766085796 + 108101455924225 = 2242714^2 + 10397185^2 .

It is a cyclic number.

It is not a de Polignac number, because 113131222010021 - 2² = 113131222010017 is a prime.

It is a super-3 number, since 3×113131222010021³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 113131222009975 and 113131222010002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113131222010221) 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, 2646075410 + ... + 2646118163.

It is an arithmetic number, because the mean of its divisors is an integer number (28284128556243).

Almost surely, 2^{113131222010021} is an apocalyptic number.

It is an amenable number.

113131222010021 is a deficient number, since it is larger than the sum of its proper divisors (5292214951).

113131222010021 is an equidigital number, since it uses as much as digits as its factorization.

113131222010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5292214950.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 113131222010021 its reverse (120010222131311), we get a palindrome (233141444141332).

The spelling of 113131222010021 in words is "one hundred thirteen trillion, one hundred thirty-one billion, two hundred twenty-two million, ten thousand, twenty-one".