21322322331 has 8 divisors (see below), whose sum is σ = 28438373184. Its totient is φ = 14210576520.

The previous prime is 21322322317. The next prime is 21322322353. The reversal of 21322322331 is 13322322312.

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

It is not a de Polignac number, because 21322322331 - 2⁵ = 21322322299 is a prime.

It is a super-3 number, since 3×21322322331³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21322321331) 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, 1064685 + ... + 1084526.

It is an arithmetic number, because the mean of its divisors is an integer number (3554796648).

Almost surely, 2^21322322331 is an apocalyptic number.

21322322331 is a deficient number, since it is larger than the sum of its proper divisors (7116050853).

21322322331 is a wasteful number, since it uses less digits than its factorization.

21322322331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152521.

The product of its digits is 2592, while the sum is 24.

Adding to 21322322331 its reverse (13322322312), we get a palindrome (34644644643).

The spelling of 21322322331 in words is "twenty-one billion, three hundred twenty-two million, three hundred twenty-two thousand, three hundred thirty-one".