22200209921 has 2 divisors, whose sum is σ = 22200209922. Its totient is φ = 22200209920.

The previous prime is 22200209909. The next prime is 22200210013. The reversal of 22200209921 is 12990200222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15217936321 + 6982273600 = 123361^2 + 83560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22200209921 is a prime.

It is not a weakly prime, because it can be changed into another prime (22200209221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100104960 + 11100104961.

It is an arithmetic number, because the mean of its divisors is an integer number (11100104961).

Almost surely, 2^22200209921 is an apocalyptic number.

It is an amenable number.

22200209921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22200209921 is an equidigital number, since it uses as much as digits as its factorization.

22200209921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 22200209921 in words is "twenty-two billion, two hundred million, two hundred nine thousand, nine hundred twenty-one".