111221321323 has 4 divisors (see below), whose sum is σ = 127110081520. Its totient is φ = 95332561128.

The previous prime is 111221321287. The next prime is 111221321327. The reversal of 111221321323 is 323123122111.

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

It is not a de Polignac number, because 111221321323 - 2²⁵ = 111187766891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111221321294 and 111221321303.

It is not an unprimeable number, because it can be changed into a prime (111221321327) 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, 7944380088 + ... + 7944380101.

It is an arithmetic number, because the mean of its divisors is an integer number (31777520380).

Almost surely, 2^111221321323 is an apocalyptic number.

111221321323 is a deficient number, since it is larger than the sum of its proper divisors (15888760197).

111221321323 is an equidigital number, since it uses as much as digits as its factorization.

111221321323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15888760196.

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

Adding to 111221321323 its reverse (323123122111), we get a palindrome (434344443434).

The spelling of 111221321323 in words is "one hundred eleven billion, two hundred twenty-one million, three hundred twenty-one thousand, three hundred twenty-three".