21424212259 has 2 divisors, whose sum is σ = 21424212260. Its totient is φ = 21424212258.

The previous prime is 21424212193. The next prime is 21424212263. The reversal of 21424212259 is 95221242412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21424212259 - 2¹⁷ = 21424081187 is a prime.

It is not a weakly prime, because it can be changed into another prime (21424212559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10712106129 + 10712106130.

It is an arithmetic number, because the mean of its divisors is an integer number (10712106130).

Almost surely, 2^21424212259 is an apocalyptic number.

21424212259 is a deficient number, since it is larger than the sum of its proper divisors (1).

21424212259 is an equidigital number, since it uses as much as digits as its factorization.

21424212259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 34.

The spelling of 21424212259 in words is "twenty-one billion, four hundred twenty-four million, two hundred twelve thousand, two hundred fifty-nine".