21002023003231 has 8 divisors (see below), whose sum is σ = 22133309876720. Its totient is φ = 19873327853952.

The previous prime is 21002023003223. The next prime is 21002023003237. The reversal of 21002023003231 is 13230032020012.

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

It is a cyclic number.

It is not a de Polignac number, because 21002023003231 - 2³ = 21002023003223 is a prime.

It is a super-3 number, since 3×21002023003231³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21002023003199 and 21002023003208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002023003237) 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, 647914410 + ... + 647946823.

It is an arithmetic number, because the mean of its divisors is an integer number (2766663734590).

Almost surely, 2^{21002023003231} is an apocalyptic number.

21002023003231 is a deficient number, since it is larger than the sum of its proper divisors (1131286873489).

21002023003231 is a wasteful number, since it uses less digits than its factorization.

21002023003231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295862105.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21002023003231 its reverse (13230032020012), we get a palindrome (34232055023243).

The spelling of 21002023003231 in words is "twenty-one trillion, two billion, twenty-three million, three thousand, two hundred thirty-one".