21213033003 has 32 divisors (see below), whose sum is σ = 31568472320. Its totient is φ = 14078370240.

The previous prime is 21213032977. The next prime is 21213033043. The reversal of 21213033003 is 30033031212.

It is a de Polignac number, because none of the positive numbers 2^k-21213033003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213033043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8104551 + ... + 8107167.

It is an arithmetic number, because the mean of its divisors is an integer number (986514760).

Almost surely, 2^21213033003 is an apocalyptic number.

21213033003 is a deficient number, since it is larger than the sum of its proper divisors (10355439317).

21213033003 is a wasteful number, since it uses less digits than its factorization.

21213033003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3864 (or 3858 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21213033003 its reverse (30033031212), we get a palindrome (51246064215).

The spelling of 21213033003 in words is "twenty-one billion, two hundred thirteen million, thirty-three thousand, three".