21300203231023 has 32 divisors (see below), whose sum is σ = 22867991677440. Its totient is φ = 19795156254720.

The previous prime is 21300203231009. The next prime is 21300203231051. The reversal of 21300203231023 is 32013230200312.

It is a cyclic number.

It is not a de Polignac number, because 21300203231023 - 2³³ = 21291613296431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21300203230985 and 21300203231003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300203237023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1168213515 + ... + 1168231747.

It is an arithmetic number, because the mean of its divisors is an integer number (714624739920).

Almost surely, 2^{21300203231023} is an apocalyptic number.

21300203231023 is a deficient number, since it is larger than the sum of its proper divisors (1567788446417).

21300203231023 is a wasteful number, since it uses less digits than its factorization.

21300203231023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25219.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21300203231023 its reverse (32013230200312), we get a palindrome (53313433431335).

The spelling of 21300203231023 in words is "twenty-one trillion, three hundred billion, two hundred three million, two hundred thirty-one thousand, twenty-three".