21004103031203 has 16 divisors (see below), whose sum is σ = 21719141587584. Its totient is φ = 20298748127040.

The previous prime is 21004103031199. The next prime is 21004103031209. The reversal of 21004103031203 is 30213030140012.

It is a cyclic number.

It is not a de Polignac number, because 21004103031203 - 2² = 21004103031199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21004103031209) 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, 59605976 + ... + 59957322.

It is an arithmetic number, because the mean of its divisors is an integer number (1357446349224).

Almost surely, 2^{21004103031203} is an apocalyptic number.

21004103031203 is a deficient number, since it is larger than the sum of its proper divisors (715038556381).

21004103031203 is a wasteful number, since it uses less digits than its factorization.

21004103031203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365122.

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

Adding to 21004103031203 its reverse (30213030140012), we get a palindrome (51217133171215).

The spelling of 21004103031203 in words is "twenty-one trillion, four billion, one hundred three million, thirty-one thousand, two hundred three".