22221208973 has 2 divisors, whose sum is σ = 22221208974. Its totient is φ = 22221208972.

The previous prime is 22221208969. The next prime is 22221208993. The reversal of 22221208973 is 37980212222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21907848169 + 313360804 = 148013^2 + 17702^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221208973 - 2² = 22221208969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221208903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110604486 + 11110604487.

It is an arithmetic number, because the mean of its divisors is an integer number (11110604487).

Almost surely, 2^22221208973 is an apocalyptic number.

It is an amenable number.

22221208973 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221208973 is an equidigital number, since it uses as much as digits as its factorization.

22221208973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 22221208973 in words is "twenty-two billion, two hundred twenty-one million, two hundred eight thousand, nine hundred seventy-three".