21312001333003 has 4 divisors (see below), whose sum is σ = 21518913967408. Its totient is φ = 21105088698600.

The previous prime is 21312001332953. The next prime is 21312001333009. The reversal of 21312001333003 is 30033310021312.

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

It is a cyclic number.

It is not a de Polignac number, because 21312001333003 - 2⁹ = 21312001332491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21312001333009) 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, 103456317048 + ... + 103456317253.

It is an arithmetic number, because the mean of its divisors is an integer number (5379728491852).

Almost surely, 2^{21312001333003} is an apocalyptic number.

21312001333003 is a deficient number, since it is larger than the sum of its proper divisors (206912634405).

21312001333003 is a wasteful number, since it uses less digits than its factorization.

21312001333003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206912634404.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21312001333003 its reverse (30033310021312), we get a palindrome (51345311354315).

The spelling of 21312001333003 in words is "twenty-one trillion, three hundred twelve billion, one million, three hundred thirty-three thousand, three".