22051080221 has 4 divisors (see below), whose sum is σ = 22051793952. Its totient is φ = 22050366492.

The previous prime is 22051080209. The next prime is 22051080269. The reversal of 22051080221 is 12208015022.

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-22051080221 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 (22051080281) 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, 308321 + ... + 373046.

It is an arithmetic number, because the mean of its divisors is an integer number (5512948488).

Almost surely, 2^22051080221 is an apocalyptic number.

It is an amenable number.

22051080221 is a deficient number, since it is larger than the sum of its proper divisors (713731).

22051080221 is an equidigital number, since it uses as much as digits as its factorization.

22051080221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713730.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 22051080221 its reverse (12208015022), we get a palindrome (34259095243).

The spelling of 22051080221 in words is "twenty-two billion, fifty-one million, eighty thousand, two hundred twenty-one".