113221223221 has 4 divisors (see below), whose sum is σ = 113224207744. Its totient is φ = 113218238700.

The previous prime is 113221223191. The next prime is 113221223251. The reversal of 113221223221 is 122322122311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (113221223191) and next prime (113221223251).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113221223221 is a prime.

It is a super-2 number, since 2×113221223221² (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 = 113221223192 and 113221223201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113221223251) 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, 1434615 + ... + 1511476.

It is an arithmetic number, because the mean of its divisors is an integer number (28306051936).

Almost surely, 2^113221223221 is an apocalyptic number.

It is an amenable number.

113221223221 is a deficient number, since it is larger than the sum of its proper divisors (2984523).

113221223221 is an equidigital number, since it uses as much as digits as its factorization.

113221223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2984522.

The product of its digits is 576, while the sum is 22.

Adding to 113221223221 its reverse (122322122311), we get a palindrome (235543345532).

The spelling of 113221223221 in words is "one hundred thirteen billion, two hundred twenty-one million, two hundred twenty-three thousand, two hundred twenty-one".