111232343221 has 36 divisors (see below), whose sum is σ = 123451289028. Its totient is φ = 99839001600.

The previous prime is 111232343219. The next prime is 111232343237. The reversal of 111232343221 is 122343232111.

It can be written as a sum of positive squares in 6 ways, for example, as 9837862596 + 101394480625 = 99186^2 + 318425^2 .

It is not a de Polignac number, because 111232343221 - 2¹ = 111232343219 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 (111232343821) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 410451316 + ... + 410451586.

It is an arithmetic number, because the mean of its divisors is an integer number (3429202473).

Almost surely, 2^111232343221 is an apocalyptic number.

It is an amenable number.

111232343221 is a deficient number, since it is larger than the sum of its proper divisors (12218945807).

111232343221 is an frugal number, since it uses more digits than its factorization.

111232343221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 382 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Adding to 111232343221 its reverse (122343232111), we get a palindrome (233575575332).

The spelling of 111232343221 in words is "one hundred eleven billion, two hundred thirty-two million, three hundred forty-three thousand, two hundred twenty-one".