21422222399 has 2 divisors, whose sum is σ = 21422222400. Its totient is φ = 21422222398.

The previous prime is 21422222383. The next prime is 21422222501. The reversal of 21422222399 is 99322222412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21422222399 - 2⁴ = 21422222383 is a prime.

It is a super-2 number, since 2×21422222399² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21422222329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711111199 + 10711111200.

It is an arithmetic number, because the mean of its divisors is an integer number (10711111200).

Almost surely, 2^21422222399 is an apocalyptic number.

21422222399 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422222399 is an equidigital number, since it uses as much as digits as its factorization.

21422222399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The spelling of 21422222399 in words is "twenty-one billion, four hundred twenty-two million, two hundred twenty-two thousand, three hundred ninety-nine".