111331221321 has 8 divisors (see below), whose sum is σ = 148491908320. Its totient is φ = 74195674272.

The previous prime is 111331221257. The next prime is 111331221361. The reversal of 111331221321 is 123122133111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111331221321 - 2⁶ = 111331221257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111331221361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6274651 + ... + 6292368.

It is an arithmetic number, because the mean of its divisors is an integer number (18561488540).

Almost surely, 2^111331221321 is an apocalyptic number.

It is an amenable number.

111331221321 is a deficient number, since it is larger than the sum of its proper divisors (37160686999).

111331221321 is a wasteful number, since it uses less digits than its factorization.

111331221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12569975.

The product of its digits is 216, while the sum is 21.

Adding to 111331221321 its reverse (123122133111), we get a palindrome (234453354432).

The spelling of 111331221321 in words is "one hundred eleven billion, three hundred thirty-one million, two hundred twenty-one thousand, three hundred twenty-one".