22225200221 has 4 divisors (see below), whose sum is σ = 25400228832. Its totient is φ = 19050171612.

The previous prime is 22225200211. The next prime is 22225200259. The reversal of 22225200221 is 12200252222.

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-22225200221 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 = 22225200193 and 22225200202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22225200211) 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, 1587514295 + ... + 1587514308.

It is an arithmetic number, because the mean of its divisors is an integer number (6350057208).

Almost surely, 2^22225200221 is an apocalyptic number.

It is an amenable number.

22225200221 is a deficient number, since it is larger than the sum of its proper divisors (3175028611).

22225200221 is an equidigital number, since it uses as much as digits as its factorization.

22225200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175028610.

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 22225200221 its reverse (12200252222), we get a palindrome (34425452443).

The spelling of 22225200221 in words is "twenty-two billion, two hundred twenty-five million, two hundred thousand, two hundred twenty-one".