111224422021 has 4 divisors (see below), whose sum is σ = 113937212844. Its totient is φ = 108511631200.

The previous prime is 111224421977. The next prime is 111224422229. The reversal of 111224422021 is 120224422111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9998000100 + 101226421921 = 99990^2 + 318161^2 .

It is a cyclic number.

It is not a de Polignac number, because 111224422021 - 2¹¹ = 111224419973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111224421983 and 111224422001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111224423021) 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, 1356395350 + ... + 1356395431.

It is an arithmetic number, because the mean of its divisors is an integer number (28484303211).

Almost surely, 2^111224422021 is an apocalyptic number.

It is an amenable number.

111224422021 is a deficient number, since it is larger than the sum of its proper divisors (2712790823).

111224422021 is an equidigital number, since it uses as much as digits as its factorization.

111224422021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712790822.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 111224422021 its reverse (120224422111), we get a palindrome (231448844132).

The spelling of 111224422021 in words is "one hundred eleven billion, two hundred twenty-four million, four hundred twenty-two thousand, twenty-one".