22111042021 has 4 divisors (see below), whose sum is σ = 22153319872. Its totient is φ = 22068764172.

The previous prime is 22111042013. The next prime is 22111042081. The reversal of 22111042021 is 12024011122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12024011122 = 2 ⋅6012005561.

It is a cyclic number.

It is not a de Polignac number, because 22111042021 - 2³ = 22111042013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111041986 and 22111042004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111042081) 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, 21138141 + ... + 21139186.

It is an arithmetic number, because the mean of its divisors is an integer number (5538329968).

Almost surely, 2^22111042021 is an apocalyptic number.

It is an amenable number.

22111042021 is a deficient number, since it is larger than the sum of its proper divisors (42277851).

22111042021 is an equidigital number, since it uses as much as digits as its factorization.

22111042021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42277850.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22111042021 its reverse (12024011122), we get a palindrome (34135053143).

The spelling of 22111042021 in words is "twenty-two billion, one hundred eleven million, forty-two thousand, twenty-one".