21322231333 has 4 divisors (see below), whose sum is σ = 22962402988. Its totient is φ = 19682059680.

The previous prime is 21322231297. The next prime is 21322231363. The reversal of 21322231333 is 33313222312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4861854529 + 16460376804 = 69727^2 + 128298^2 .

It is a cyclic number.

It is not a de Polignac number, because 21322231333 - 2⁹ = 21322230821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21322231298 and 21322231307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322231363) 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, 820085808 + ... + 820085833.

It is an arithmetic number, because the mean of its divisors is an integer number (5740600747).

Almost surely, 2^21322231333 is an apocalyptic number.

It is an amenable number.

21322231333 is a deficient number, since it is larger than the sum of its proper divisors (1640171655).

21322231333 is a wasteful number, since it uses less digits than its factorization.

21322231333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640171654.

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

Adding to 21322231333 its reverse (33313222312), we get a palindrome (54635453645).

The spelling of 21322231333 in words is "twenty-one billion, three hundred twenty-two million, two hundred thirty-one thousand, three hundred thirty-three".