111224234021 has 2 divisors, whose sum is σ = 111224234022. Its totient is φ = 111224234020.

The previous prime is 111224233993. The next prime is 111224234047. The reversal of 111224234021 is 120432422111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105060256900 + 6163977121 = 324130^2 + 78511^2 .

It is a cyclic number.

It is not a de Polignac number, because 111224234021 - 2²² = 111220039717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111224231021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55612117010 + 55612117011.

It is an arithmetic number, because the mean of its divisors is an integer number (55612117011).

Almost surely, 2^111224234021 is an apocalyptic number.

It is an amenable number.

111224234021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111224234021 is an equidigital number, since it uses as much as digits as its factorization.

111224234021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 111224234021 its reverse (120432422111), we get a palindrome (231656656132).

The spelling of 111224234021 in words is "one hundred eleven billion, two hundred twenty-four million, two hundred thirty-four thousand, twenty-one".