21021213013003 has 8 divisors (see below), whose sum is σ = 24030617642720. Its totient is φ = 18013401933120.

The previous prime is 21021213012967. The next prime is 21021213013043. The reversal of 21021213013003 is 30031031212012.

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-21021213013003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021213013043) 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 7 ways as a sum of consecutive naturals, for example, 398359188 + ... + 398411953.

It is an arithmetic number, because the mean of its divisors is an integer number (3003827205340).

Almost surely, 2^{21021213013003} is an apocalyptic number.

21021213013003 is a deficient number, since it is larger than the sum of its proper divisors (3009404629717).

21021213013003 is an equidigital number, since it uses as much as digits as its factorization.

21021213013003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796774917.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21021213013003 its reverse (30031031212012), we get a palindrome (51052244225015).

The spelling of 21021213013003 in words is "twenty-one trillion, twenty-one billion, two hundred thirteen million, thirteen thousand, three".