113221331221 has 4 divisors (see below), whose sum is σ = 114493481100. Its totient is φ = 111949181344.

The previous prime is 113221331207. The next prime is 113221331329. The reversal of 113221331221 is 122133122311.

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 30211654225 + 83009676996 = 173815^2 + 288114^2 .

It is a cyclic number.

It is not a de Polignac number, because 113221331221 - 2²⁹ = 112684460309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113221331192 and 113221331201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113221331021) 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, 636074806 + ... + 636074983.

It is an arithmetic number, because the mean of its divisors is an integer number (28623370275).

Almost surely, 2^113221331221 is an apocalyptic number.

It is an amenable number.

113221331221 is a deficient number, since it is larger than the sum of its proper divisors (1272149879).

113221331221 is an equidigital number, since it uses as much as digits as its factorization.

113221331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272149878.

The product of its digits is 432, while the sum is 22.

Adding to 113221331221 its reverse (122133122311), we get a palindrome (235354453532).

The spelling of 113221331221 in words is "one hundred thirteen billion, two hundred twenty-one million, three hundred thirty-one thousand, two hundred twenty-one".