22212202021 has 4 divisors (see below), whose sum is σ = 22684802112. Its totient is φ = 21739601932.

The previous prime is 22212201929. The next prime is 22212202039. The reversal of 22212202021 is 12020221222.

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 a de Polignac number, because none of the positive numbers 2^k-22212202021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22212201986 and 22212202004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212202721) 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, 236299975 + ... + 236300068.

It is an arithmetic number, because the mean of its divisors is an integer number (5671200528).

Almost surely, 2^22212202021 is an apocalyptic number.

It is an amenable number.

22212202021 is a deficient number, since it is larger than the sum of its proper divisors (472600091).

22212202021 is an equidigital number, since it uses as much as digits as its factorization.

22212202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472600090.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22212202021 its reverse (12020221222), we get a palindrome (34232423243).

The spelling of 22212202021 in words is "twenty-two billion, two hundred twelve million, two hundred two thousand, twenty-one".