21222122199589 has 2 divisors, whose sum is σ = 21222122199590. Its totient is φ = 21222122199588.

The previous prime is 21222122199557. The next prime is 21222122199643. The reversal of 21222122199589 is 98599122122212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21152484267489 + 69637932100 = 4599183^2 + 263890^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222122199589 - 2⁵ = 21222122199557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222122199389) 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, 10611061099794 + 10611061099795.

It is an arithmetic number, because the mean of its divisors is an integer number (10611061099795).

Almost surely, 2^{21222122199589} is an apocalyptic number.

It is an amenable number.

21222122199589 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222122199589 is an equidigital number, since it uses as much as digits as its factorization.

21222122199589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 55.

The spelling of 21222122199589 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty-two million, one hundred ninety-nine thousand, five hundred eighty-nine".