22212002021 has 4 divisors (see below), whose sum is σ = 24231274944. Its totient is φ = 20192729100.

The previous prime is 22212001993. The next prime is 22212002039. The reversal of 22212002021 is 12020021222.

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 22212002021 - 2¹⁴ = 22211985637 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 = 22212001987 and 22212002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212002081) 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, 1009636445 + ... + 1009636466.

It is an arithmetic number, because the mean of its divisors is an integer number (6057818736).

Almost surely, 2^22212002021 is an apocalyptic number.

It is an amenable number.

22212002021 is a deficient number, since it is larger than the sum of its proper divisors (2019272923).

22212002021 is a wasteful number, since it uses less digits than its factorization.

22212002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019272922.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22212002021 its reverse (12020021222), we get a palindrome (34232023243).

The spelling of 22212002021 in words is "twenty-two billion, two hundred twelve million, two thousand, twenty-one".