22211202021 has 4 divisors (see below), whose sum is σ = 29614936032. Its totient is φ = 14807468012.

The previous prime is 22211202007. The next prime is 22211202037. The reversal of 22211202021 is 12020211222.

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 22211202021 - 2¹⁷ = 22211070949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211202071) 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, 3701867001 + ... + 3701867006.

It is an arithmetic number, because the mean of its divisors is an integer number (7403734008).

Almost surely, 2^22211202021 is an apocalyptic number.

It is an amenable number.

22211202021 is a deficient number, since it is larger than the sum of its proper divisors (7403734011).

22211202021 is an equidigital number, since it uses as much as digits as its factorization.

22211202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7403734010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22211202021 its reverse (12020211222), we get a palindrome (34231413243).

The spelling of 22211202021 in words is "twenty-two billion, two hundred eleven million, two hundred two thousand, twenty-one".