21023123002039 has 8 divisors (see below), whose sum is σ = 21038710230000. Its totient is φ = 21007539557952.

The previous prime is 21023123002001. The next prime is 21023123002043. The reversal of 21023123002039 is 93020032132012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21023123002039 is a prime.

It is a super-2 number, since 2×21023123002039² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21023123001998 and 21023123002016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023123002099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10218897 + ... + 12102565.

It is an arithmetic number, because the mean of its divisors is an integer number (2629838778750).

Almost surely, 2^{21023123002039} is an apocalyptic number.

21023123002039 is a deficient number, since it is larger than the sum of its proper divisors (15587227961).

21023123002039 is a wasteful number, since it uses less digits than its factorization.

21023123002039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891937.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 21023123002039 in words is "twenty-one trillion, twenty-three billion, one hundred twenty-three million, two thousand, thirty-nine".