111231322200021 has 16 divisors (see below), whose sum is σ = 150744801010880. Its totient is φ = 72936111121920.

The previous prime is 111231322199999. The next prime is 111231322200043. The reversal of 111231322200021 is 120002223132111.

It is an interprime number because it is at equal distance from previous prime (111231322199999) and next prime (111231322200043).

It is not a de Polignac number, because 111231322200021 - 2⁵ = 111231322199989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111231322204021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4806556 + ... + 15670533.

It is an arithmetic number, because the mean of its divisors is an integer number (9421550063180).

Almost surely, 2^{111231322200021} is an apocalyptic number.

It is an amenable number.

111231322200021 is a deficient number, since it is larger than the sum of its proper divisors (39513478810859).

111231322200021 is a wasteful number, since it uses less digits than its factorization.

111231322200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20506836.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 111231322200021 its reverse (120002223132111), we get a palindrome (231233545332132).

The spelling of 111231322200021 in words is "one hundred eleven trillion, two hundred thirty-one billion, three hundred twenty-two million, two hundred thousand, twenty-one".