21123033359 has 2 divisors, whose sum is σ = 21123033360. Its totient is φ = 21123033358.

The previous prime is 21123033313. The next prime is 21123033397. The reversal of 21123033359 is 95333032112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21123033359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21123035359) 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, 10561516679 + 10561516680.

It is an arithmetic number, because the mean of its divisors is an integer number (10561516680).

Almost surely, 2^21123033359 is an apocalyptic number.

21123033359 is a deficient number, since it is larger than the sum of its proper divisors (1).

21123033359 is an equidigital number, since it uses as much as digits as its factorization.

21123033359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 32.

The spelling of 21123033359 in words is "twenty-one billion, one hundred twenty-three million, thirty-three thousand, three hundred fifty-nine".