22101221999 has 2 divisors, whose sum is σ = 22101222000. Its totient is φ = 22101221998.

The previous prime is 22101221981. The next prime is 22101222023. The reversal of 22101221999 is 99912210122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22101221999 - 2²⁴ = 22084444783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22101221959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050610999 + 11050611000.

It is an arithmetic number, because the mean of its divisors is an integer number (11050611000).

Almost surely, 2^22101221999 is an apocalyptic number.

22101221999 is a deficient number, since it is larger than the sum of its proper divisors (1).

22101221999 is an equidigital number, since it uses as much as digits as its factorization.

22101221999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 22101221999 in words is "twenty-two billion, one hundred one million, two hundred twenty-one thousand, nine hundred ninety-nine".