21123313059983 has 4 divisors (see below), whose sum is σ = 21123391762200. Its totient is φ = 21123234357768.

The previous prime is 21123313059971. The next prime is 21123313060009. The reversal of 21123313059983 is 38995031332112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21123313059983 - 2¹⁰ = 21123313058959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123313059923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38947133 + ... + 39485766.

It is an arithmetic number, because the mean of its divisors is an integer number (5280847940550).

Almost surely, 2^{21123313059983} is an apocalyptic number.

21123313059983 is a deficient number, since it is larger than the sum of its proper divisors (78702217).

21123313059983 is an equidigital number, since it uses as much as digits as its factorization.

21123313059983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78702216.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The spelling of 21123313059983 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred thirteen million, fifty-nine thousand, nine hundred eighty-three".