21000221132003 has 4 divisors (see below), whose sum is σ = 21077712723168. Its totient is φ = 20922729540840.

The previous prime is 21000221131997. The next prime is 21000221132029. The reversal of 21000221132003 is 30023112200012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21000221132003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000221132503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38745795176 + ... + 38745795717.

It is an arithmetic number, because the mean of its divisors is an integer number (5269428180792).

Almost surely, 2^{21000221132003} is an apocalyptic number.

21000221132003 is a deficient number, since it is larger than the sum of its proper divisors (77491591165).

21000221132003 is an equidigital number, since it uses as much as digits as its factorization.

21000221132003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77491591164.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21000221132003 its reverse (30023112200012), we get a palindrome (51023333332015).

The spelling of 21000221132003 in words is "twenty-one trillion, two hundred twenty-one million, one hundred thirty-two thousand, three".