22221019993 has 2 divisors, whose sum is σ = 22221019994. Its totient is φ = 22221019992.

The previous prime is 22221019939. The next prime is 22221020027. The reversal of 22221019993 is 39991012222.

Together with previous prime (22221019939) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21807019584 + 414000409 = 147672^2 + 20347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22221019993 is a prime.

It is not a weakly prime, because it can be changed into another prime (22221019903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110509996 + 11110509997.

It is an arithmetic number, because the mean of its divisors is an integer number (11110509997).

Almost surely, 2^22221019993 is an apocalyptic number.

It is an amenable number.

22221019993 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221019993 is an equidigital number, since it uses as much as digits as its factorization.

22221019993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 22221019993 in words is "twenty-two billion, two hundred twenty-one million, nineteen thousand, nine hundred ninety-three".