21232321330 has 48 divisors (see below), whose sum is σ = 42042537432. Its totient is φ = 7714572800.

The previous prime is 21232321291. The next prime is 21232321379. The reversal of 21232321330 is 3312323212.

It can be written as a sum of positive squares in 4 ways, for example, as 14611732641 + 6620588689 = 120879^2 + 81367^2 .

It is a super-2 number, since 2×21232321330² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1640364 + ... + 1653256.

Almost surely, 2^21232321330 is an apocalyptic number.

21232321330 is a deficient number, since it is larger than the sum of its proper divisors (20810216102).

21232321330 is a wasteful number, since it uses less digits than its factorization.

21232321330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14283 (or 14272 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21232321330 its reverse (3312323212), we get a palindrome (24544644542).

The spelling of 21232321330 in words is "twenty-one billion, two hundred thirty-two million, three hundred twenty-one thousand, three hundred thirty".