22121219999 has 2 divisors, whose sum is σ = 22121220000. Its totient is φ = 22121219998.

The previous prime is 22121219993. The next prime is 22121220049. The reversal of 22121219999 is 99991212122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22121219999 - 2²⁴ = 22104442783 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121219993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060609999 + 11060610000.

It is an arithmetic number, because the mean of its divisors is an integer number (11060610000).

Almost surely, 2^22121219999 is an apocalyptic number.

22121219999 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121219999 is an equidigital number, since it uses as much as digits as its factorization.

22121219999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 47.

The spelling of 22121219999 in words is "twenty-two billion, one hundred twenty-one million, two hundred nineteen thousand, nine hundred ninety-nine".