113221311211 has 4 divisors (see below), whose sum is σ = 113359218624. Its totient is φ = 113083403800.

The previous prime is 113221311179. The next prime is 113221311221. The reversal of 113221311211 is 112113122311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112113122311 = 28387 ⋅3949453.

It is a cyclic number.

It is not a de Polignac number, because 113221311211 - 2⁵ = 113221311179 is a prime.

It is a super-2 number, since 2×113221311211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113221311221) 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, 68952475 + ... + 68954116.

It is an arithmetic number, because the mean of its divisors is an integer number (28339804656).

Almost surely, 2^113221311211 is an apocalyptic number.

113221311211 is a deficient number, since it is larger than the sum of its proper divisors (137907413).

113221311211 is an equidigital number, since it uses as much as digits as its factorization.

113221311211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137907412.

The product of its digits is 72, while the sum is 19.

Adding to 113221311211 its reverse (112113122311), we get a palindrome (225334433522).

The spelling of 113221311211 in words is "one hundred thirteen billion, two hundred twenty-one million, three hundred eleven thousand, two hundred eleven".