22112021021 has 4 divisors (see below), whose sum is σ = 22626254112. Its totient is φ = 21597787932.

The previous prime is 22112021017. The next prime is 22112021053. The reversal of 22112021021 is 12012021122.

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 22112021021 - 2² = 22112021017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22112020987 and 22112021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112021011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257116481 + ... + 257116566.

It is an arithmetic number, because the mean of its divisors is an integer number (5656563528).

Almost surely, 2^22112021021 is an apocalyptic number.

It is an amenable number.

22112021021 is a deficient number, since it is larger than the sum of its proper divisors (514233091).

22112021021 is an equidigital number, since it uses as much as digits as its factorization.

22112021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514233090.

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

Adding to 22112021021 its reverse (12012021122), we get a palindrome (34124042143).

The spelling of 22112021021 in words is "twenty-two billion, one hundred twelve million, twenty-one thousand, twenty-one".