22221999949 has 2 divisors, whose sum is σ = 22221999950. Its totient is φ = 22221999948.

The previous prime is 22221999913. The next prime is 22222000039. The reversal of 22221999949 is 94999912222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16645644324 + 5576355625 = 129018^2 + 74675^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221999949 - 2²⁷ = 22087782221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22221999893 and 22221999902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221949949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110999974 + 11110999975.

It is an arithmetic number, because the mean of its divisors is an integer number (11110999975).

Almost surely, 2^22221999949 is an apocalyptic number.

It is an amenable number.

22221999949 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221999949 is an equidigital number, since it uses as much as digits as its factorization.

22221999949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 58.

The spelling of 22221999949 in words is "twenty-two billion, two hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred forty-nine".