22010201221 has 4 divisors (see below), whose sum is σ = 22720207744. Its totient is φ = 21300194700.

The previous prime is 22010201207. The next prime is 22010201237. The reversal of 22010201221 is 12210201022.

It is a happy number.

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-22010201221 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 (22010201251) 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, 355003215 + ... + 355003276.

It is an arithmetic number, because the mean of its divisors is an integer number (5680051936).

Almost surely, 2^22010201221 is an apocalyptic number.

It is an amenable number.

22010201221 is a deficient number, since it is larger than the sum of its proper divisors (710006523).

22010201221 is an equidigital number, since it uses as much as digits as its factorization.

22010201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710006522.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22010201221 its reverse (12210201022), we get a palindrome (34220402243).

The spelling of 22010201221 in words is "twenty-two billion, ten million, two hundred one thousand, two hundred twenty-one".