21303003331 has 8 divisors (see below), whose sum is σ = 22680743904. Its totient is φ = 19939109760.

The previous prime is 21303003317. The next prime is 21303003347. The reversal of 21303003331 is 13330030312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21303003331 - 2²⁹ = 20766132419 is a prime.

It is a super-2 number, since 2×21303003331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21303003299 and 21303003308.

It is not an unprimeable number, because it can be changed into a prime (21303003301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3458575 + ... + 3464728.

It is an arithmetic number, because the mean of its divisors is an integer number (2835092988).

Almost surely, 2^21303003331 is an apocalyptic number.

21303003331 is a deficient number, since it is larger than the sum of its proper divisors (1377740573).

21303003331 is a wasteful number, since it uses less digits than its factorization.

21303003331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6923501.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 21303003331 its reverse (13330030312), we get a palindrome (34633033643).

The spelling of 21303003331 in words is "twenty-one billion, three hundred three million, three thousand, three hundred thirty-one".