22221203021 has 4 divisors (see below), whose sum is σ = 22345344000. Its totient is φ = 22097062044.

The previous prime is 22221202973. The next prime is 22221203023. The reversal of 22221203021 is 12030212222.

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-22221203021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221203023) 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, 62070221 + ... + 62070578.

It is an arithmetic number, because the mean of its divisors is an integer number (5586336000).

Almost surely, 2^22221203021 is an apocalyptic number.

It is an amenable number.

22221203021 is a deficient number, since it is larger than the sum of its proper divisors (124140979).

22221203021 is a wasteful number, since it uses less digits than its factorization.

22221203021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124140978.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 22221203021 its reverse (12030212222), we get a palindrome (34251415243).

The spelling of 22221203021 in words is "twenty-two billion, two hundred twenty-one million, two hundred three thousand, twenty-one".