21123232210279 has 2 divisors, whose sum is σ = 21123232210280. Its totient is φ = 21123232210278.

The previous prime is 21123232210277. The next prime is 21123232210321. The reversal of 21123232210279 is 97201223232112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21123232210279 - 2¹ = 21123232210277 is a prime.

Together with 21123232210277, 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 (21123232210277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561616105139 + 10561616105140.

It is an arithmetic number, because the mean of its divisors is an integer number (10561616105140).

Almost surely, 2^{21123232210279} is an apocalyptic number.

21123232210279 is a deficient number, since it is larger than the sum of its proper divisors (1).

21123232210279 is an equidigital number, since it uses as much as digits as its factorization.

21123232210279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 21123232210279 in words is "twenty-one trillion, one hundred twenty-three billion, two hundred thirty-two million, two hundred ten thousand, two hundred seventy-nine".