21310322003 has 4 divisors (see below), whose sum is σ = 21313020960. Its totient is φ = 21307623048.

The previous prime is 21310321999. The next prime is 21310322009. The reversal of 21310322003 is 30022301312.

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 21310322003 - 2² = 21310321999 is a prime.

It is a super-3 number, since 3×21310322003³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21310322009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1337600 + ... + 1353437.

It is an arithmetic number, because the mean of its divisors is an integer number (5328255240).

Almost surely, 2^21310322003 is an apocalyptic number.

21310322003 is a deficient number, since it is larger than the sum of its proper divisors (2698957).

21310322003 is an equidigital number, since it uses as much as digits as its factorization.

21310322003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698956.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21310322003 its reverse (30022301312), we get a palindrome (51332623315).

The spelling of 21310322003 in words is "twenty-one billion, three hundred ten million, three hundred twenty-two thousand, three".