21001132303 has 8 divisors (see below), whose sum is σ = 21237158880. Its totient is φ = 20765656800.

The previous prime is 21001132289. The next prime is 21001132309. The reversal of 21001132303 is 30323110012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21001132303 is a prime.

It is a super-2 number, since 2×21001132303² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001132309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60883 + ... + 213796.

It is an arithmetic number, because the mean of its divisors is an integer number (2654644860).

Almost surely, 2^21001132303 is an apocalyptic number.

21001132303 is a deficient number, since it is larger than the sum of its proper divisors (236026577).

21001132303 is a wasteful number, since it uses less digits than its factorization.

21001132303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275537.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21001132303 its reverse (30323110012), we get a palindrome (51324242315).

The spelling of 21001132303 in words is "twenty-one billion, one million, one hundred thirty-two thousand, three hundred three".