22121222099 has 2 divisors, whose sum is σ = 22121222100. Its totient is φ = 22121222098.

The previous prime is 22121222063. The next prime is 22121222117. The reversal of 22121222099 is 99022212122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121222099 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121222029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060611049 + 11060611050.

It is an arithmetic number, because the mean of its divisors is an integer number (11060611050).

Almost surely, 2^22121222099 is an apocalyptic number.

22121222099 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121222099 is an equidigital number, since it uses as much as digits as its factorization.

22121222099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

It can be divided in two parts, 22 and 121222099, that added together give a palindrome (121222121).

The spelling of 22121222099 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, ninety-nine".