113100311221 has 6 divisors (see below), whose sum is σ = 119366256822. Its totient is φ = 107147662920.

The previous prime is 113100311209. The next prime is 113100311231. The reversal of 113100311221 is 122113001311.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 98401416100 + 14698895121 = 313690^2 + 121239^2 .

It is not a de Polignac number, because 113100311221 - 2⁹ = 113100310709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113100311195 and 113100311204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113100311201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156648270 + ... + 156648991.

It is an arithmetic number, because the mean of its divisors is an integer number (19894376137).

Almost surely, 2^113100311221 is an apocalyptic number.

It is an amenable number.

113100311221 is a deficient number, since it is larger than the sum of its proper divisors (6265945601).

113100311221 is an equidigital number, since it uses as much as digits as its factorization.

113100311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313297299 (or 313297280 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 113100311221 its reverse (122113001311), we get a palindrome (235213312532).

The spelling of 113100311221 in words is "one hundred thirteen billion, one hundred million, three hundred eleven thousand, two hundred twenty-one".