21013331001003 has 48 divisors (see below), whose sum is σ = 33290923760640. Its totient is φ = 12666607646400.

The previous prime is 21013331001001. The next prime is 21013331001011. The reversal of 21013331001003 is 30010013331012.

It is a happy number.

21013331001003 is a `hidden beast` number, since 210 + 133 + 310 + 0 + 10 + 0 + 3 = 666.

It is not a de Polignac number, because 21013331001003 - 2¹ = 21013331001001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21013331001001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23649793 + ... + 24522221.

It is an arithmetic number, because the mean of its divisors is an integer number (693560911680).

Almost surely, 2^{21013331001003} is an apocalyptic number.

21013331001003 is a deficient number, since it is larger than the sum of its proper divisors (12277592759637).

21013331001003 is a wasteful number, since it uses less digits than its factorization.

21013331001003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873760 (or 873757 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 21013331001003 its reverse (30010013331012), we get a palindrome (51023344332015).

The spelling of 21013331001003 in words is "twenty-one trillion, thirteen billion, three hundred thirty-one million, one thousand, three".