21321322303003 has 16 divisors (see below), whose sum is σ = 22127306737536. Its totient is φ = 20530509733440.

The previous prime is 21321322302997. The next prime is 21321322303027. The reversal of 21321322303003 is 30030322312312.

It is a cyclic number.

It is not a de Polignac number, because 21321322303003 - 2⁵ = 21321322302971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21321322303033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4729458 + ... + 8062903.

It is an arithmetic number, because the mean of its divisors is an integer number (1382956671096).

Almost surely, 2^{21321322303003} is an apocalyptic number.

21321322303003 is a deficient number, since it is larger than the sum of its proper divisors (805984434533).

21321322303003 is a wasteful number, since it uses less digits than its factorization.

21321322303003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12792954.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21321322303003 its reverse (30030322312312), we get a palindrome (51351644615315).

The spelling of 21321322303003 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred twenty-two million, three hundred three thousand, three".