22021219973 has 2 divisors, whose sum is σ = 22021219974. Its totient is φ = 22021219972.

The previous prime is 22021219951. The next prime is 22021220029. The reversal of 22021219973 is 37991212022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18806556769 + 3214663204 = 137137^2 + 56698^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021219973 - 2¹⁰ = 22021218949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22021219933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010609986 + 11010609987.

It is an arithmetic number, because the mean of its divisors is an integer number (11010609987).

Almost surely, 2^22021219973 is an apocalyptic number.

It is an amenable number.

22021219973 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021219973 is an equidigital number, since it uses as much as digits as its factorization.

22021219973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 22021219973 in words is "twenty-two billion, twenty-one million, two hundred nineteen thousand, nine hundred seventy-three".