22210201121921 has 2 divisors, whose sum is σ = 22210201121922. Its totient is φ = 22210201121920.

The previous prime is 22210201121909. The next prime is 22210201121947. The reversal of 22210201121921 is 12912110201222.

It is an a-pointer prime, because the next prime (22210201121947) can be obtained adding 22210201121921 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16985154903025 + 5225046218896 = 4121305^2 + 2285836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22210201121921 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22210201121951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105100560960 + 11105100560961.

It is an arithmetic number, because the mean of its divisors is an integer number (11105100560961).

Almost surely, 2^{22210201121921} is an apocalyptic number.

It is an amenable number.

22210201121921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22210201121921 is an equidigital number, since it uses as much as digits as its factorization.

22210201121921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 22210201121921 in words is "twenty-two trillion, two hundred ten billion, two hundred one million, one hundred twenty-one thousand, nine hundred twenty-one".