22021210901 has 2 divisors, whose sum is σ = 22021210902. Its totient is φ = 22021210900.

The previous prime is 22021210867. The next prime is 22021210973. The reversal of 22021210901 is 10901212022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17346207025 + 4675003876 = 131705^2 + 68374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22021210901 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22021210301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010605450 + 11010605451.

It is an arithmetic number, because the mean of its divisors is an integer number (11010605451).

Almost surely, 2^22021210901 is an apocalyptic number.

It is an amenable number.

22021210901 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021210901 is an equidigital number, since it uses as much as digits as its factorization.

22021210901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 22021210901 its reverse (10901212022), we get a palindrome (32922422923).

The spelling of 22021210901 in words is "twenty-two billion, twenty-one million, two hundred ten thousand, nine hundred one".