21023003121203 has 16 divisors (see below), whose sum is σ = 21608305770624. Its totient is φ = 20443465860480.

The previous prime is 21023003121193. The next prime is 21023003121221. The reversal of 21023003121203 is 30212130032012.

It is a cyclic number.

It is not a de Polignac number, because 21023003121203 - 2¹⁰ = 21023003120179 is a prime.

It is a super-2 number, since 2×21023003121203² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21023003123203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144533573 + ... + 144678953.

It is an arithmetic number, because the mean of its divisors is an integer number (1350519110664).

Almost surely, 2^{21023003121203} is an apocalyptic number.

21023003121203 is a deficient number, since it is larger than the sum of its proper divisors (585302649421).

21023003121203 is a wasteful number, since it uses less digits than its factorization.

21023003121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165182.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21023003121203 its reverse (30212130032012), we get a palindrome (51235133153215).

The spelling of 21023003121203 in words is "twenty-one trillion, twenty-three billion, three million, one hundred twenty-one thousand, two hundred three".