22200120221 has 4 divisors (see below), whose sum is σ = 22201085244. Its totient is φ = 22199155200.

The previous prime is 22200120197. The next prime is 22200120247. The reversal of 22200120221 is 12202100222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10709352196 + 11490768025 = 103486^2 + 107195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22200120221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22200120196 and 22200120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200120251) 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, 447140 + ... + 494301.

It is an arithmetic number, because the mean of its divisors is an integer number (5550271311).

Almost surely, 2^22200120221 is an apocalyptic number.

It is an amenable number.

22200120221 is a deficient number, since it is larger than the sum of its proper divisors (965023).

22200120221 is an equidigital number, since it uses as much as digits as its factorization.

22200120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965022.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22200120221 its reverse (12202100222), we get a palindrome (34402220443).

The spelling of 22200120221 in words is "twenty-two billion, two hundred million, one hundred twenty thousand, two hundred twenty-one".