21223117219 has 2 divisors, whose sum is σ = 21223117220. Its totient is φ = 21223117218.

The previous prime is 21223117177. The next prime is 21223117243. The reversal of 21223117219 is 91271132212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21223117219 - 2²⁵ = 21189562787 is a prime.

It is a super-2 number, since 2×21223117219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21223117519) 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, 10611558609 + 10611558610.

It is an arithmetic number, because the mean of its divisors is an integer number (10611558610).

Almost surely, 2^21223117219 is an apocalyptic number.

21223117219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223117219 is an equidigital number, since it uses as much as digits as its factorization.

21223117219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 31.

The spelling of 21223117219 in words is "twenty-one billion, two hundred twenty-three million, one hundred seventeen thousand, two hundred nineteen".