1111321233221 has 4 divisors (see below), whose sum is σ = 1117975851552. Its totient is φ = 1104666614892.

The previous prime is 1111321233173. The next prime is 1111321233241. The reversal of 1111321233221 is 1223321231111.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111321233221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111321233241) 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, 3327308915 + ... + 3327309248.

It is an arithmetic number, because the mean of its divisors is an integer number (279493962888).

Almost surely, 2^{1111321233221} is an apocalyptic number.

It is an amenable number.

1111321233221 is a deficient number, since it is larger than the sum of its proper divisors (6654618331).

1111321233221 is an equidigital number, since it uses as much as digits as its factorization.

1111321233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6654618330.

The product of its digits is 432, while the sum is 23.

Adding to 1111321233221 its reverse (1223321231111), we get a palindrome (2334642464332).

The spelling of 1111321233221 in words is "one trillion, one hundred eleven billion, three hundred twenty-one million, two hundred thirty-three thousand, two hundred twenty-one".