21001132003 has 4 divisors (see below), whose sum is σ = 22106454760. Its totient is φ = 19895809248.

The previous prime is 21001131967. The next prime is 21001132039. The reversal of 21001132003 is 30023110012.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21001131967) and next prime (21001132039).

It is a cyclic number.

It is not a de Polignac number, because 21001132003 - 2³³ = 12411197411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001133003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552661350 + ... + 552661387.

It is an arithmetic number, because the mean of its divisors is an integer number (5526613690).

Almost surely, 2^21001132003 is an apocalyptic number.

21001132003 is a deficient number, since it is larger than the sum of its proper divisors (1105322757).

21001132003 is a wasteful number, since it uses less digits than its factorization.

21001132003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105322756.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21001132003 its reverse (30023110012), we get a palindrome (51024242015).

The spelling of 21001132003 in words is "twenty-one billion, one million, one hundred thirty-two thousand, three".