21272627279 has 2 divisors, whose sum is σ = 21272627280. Its totient is φ = 21272627278.

The previous prime is 21272627263. The next prime is 21272627281. The reversal of 21272627279 is 97272627212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21272627279 - 2⁴ = 21272627263 is a prime.

Together with 21272627281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21272627209) 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, 10636313639 + 10636313640.

It is an arithmetic number, because the mean of its divisors is an integer number (10636313640).

Almost surely, 2^21272627279 is an apocalyptic number.

21272627279 is a deficient number, since it is larger than the sum of its proper divisors (1).

21272627279 is an equidigital number, since it uses as much as digits as its factorization.

21272627279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 47.

The spelling of 21272627279 in words is "twenty-one billion, two hundred seventy-two million, six hundred twenty-seven thousand, two hundred seventy-nine".