111424434221 has 4 divisors (see below), whose sum is σ = 113795166912. Its totient is φ = 109053701532.

The previous prime is 111424434217. The next prime is 111424434241. The reversal of 111424434221 is 122434424111.

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 not a de Polignac number, because 111424434221 - 2² = 111424434217 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 (111424434241) 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, 1185366275 + ... + 1185366368.

It is an arithmetic number, because the mean of its divisors is an integer number (28448791728).

Almost surely, 2^111424434221 is an apocalyptic number.

It is an amenable number.

111424434221 is a deficient number, since it is larger than the sum of its proper divisors (2370732691).

111424434221 is an equidigital number, since it uses as much as digits as its factorization.

111424434221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370732690.

The product of its digits is 6144, while the sum is 29.

Adding to 111424434221 its reverse (122434424111), we get a palindrome (233858858332).

The spelling of 111424434221 in words is "one hundred eleven billion, four hundred twenty-four million, four hundred thirty-four thousand, two hundred twenty-one".