21322333331 has 24 divisors (see below), whose sum is σ = 23775474240. Its totient is φ = 19006517376.

The previous prime is 21322333313. The next prime is 21322333363. The reversal of 21322333331 is 13333322312.

It is a happy number.

It is not a de Polignac number, because 21322333331 - 2³⁰ = 20248591507 is a prime.

It is a super-2 number, since 2×21322333331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21322333331.

It is not an unprimeable number, because it can be changed into a prime (21322333391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2134310 + ... + 2144276.

It is an arithmetic number, because the mean of its divisors is an integer number (990644760).

Almost surely, 2^21322333331 is an apocalyptic number.

21322333331 is a deficient number, since it is larger than the sum of its proper divisors (2453140909).

21322333331 is an equidigital number, since it uses as much as digits as its factorization.

21322333331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10155 (or 10112 counting only the distinct ones).

The product of its digits is 5832, while the sum is 26.

Adding to 21322333331 its reverse (13333322312), we get a palindrome (34655655643).

The spelling of 21322333331 in words is "twenty-one billion, three hundred twenty-two million, three hundred thirty-three thousand, three hundred thirty-one".