21233122279 has 2 divisors, whose sum is σ = 21233122280. Its totient is φ = 21233122278.

The previous prime is 21233122277. The next prime is 21233122301. The reversal of 21233122279 is 97222133212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21233122279 - 2¹ = 21233122277 is a prime.

Together with 21233122277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21233122277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616561139 + 10616561140.

It is an arithmetic number, because the mean of its divisors is an integer number (10616561140).

Almost surely, 2^21233122279 is an apocalyptic number.

21233122279 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233122279 is an equidigital number, since it uses as much as digits as its factorization.

21233122279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The spelling of 21233122279 in words is "twenty-one billion, two hundred thirty-three million, one hundred twenty-two thousand, two hundred seventy-nine".