22021112021 has 4 divisors (see below), whose sum is σ = 22057391232. Its totient is φ = 21984832812.

The previous prime is 22021111999. The next prime is 22021112023. The reversal of 22021112021 is 12021112022.

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 22021112021 - 2¹⁰ = 22021110997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22021111987 and 22021112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021112023) 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, 18138695 + ... + 18139908.

It is an arithmetic number, because the mean of its divisors is an integer number (5514347808).

Almost surely, 2^22021112021 is an apocalyptic number.

It is an amenable number.

22021112021 is a deficient number, since it is larger than the sum of its proper divisors (36279211).

22021112021 is an equidigital number, since it uses as much as digits as its factorization.

22021112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36279210.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22021112021 its reverse (12021112022), we get a palindrome (34042224043).

Subtracting from 22021112021 its reverse (12021112022), we obtain a palindrome (9999999999).

It can be divided in two parts, 220211 and 12021, that added together give a palindrome (232232).

The spelling of 22021112021 in words is "twenty-two billion, twenty-one million, one hundred twelve thousand, twenty-one".