13221612232 has 64 divisors (see below), whose sum is σ = 28043064000. Its totient is φ = 5806411776.

The previous prime is 13221612221. The next prime is 13221612233. The reversal of 13221612232 is 23221612231.

It is a super-2 number, since 2×13221612232² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13221612197 and 13221612206.

It is not an unprimeable number, because it can be changed into a prime (13221612233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134944 + ... + 211312.

It is an arithmetic number, because the mean of its divisors is an integer number (438172875).

Almost surely, 2^13221612232 is an apocalyptic number.

It is an amenable number.

13221612232 is an abundant number, since it is smaller than the sum of its proper divisors (14821451768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13221612232 is a wasteful number, since it uses less digits than its factorization.

13221612232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76478 (or 76474 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Subtracting 13221612232 from its reverse (23221612231), we obtain a palindrome (9999999999).

The spelling of 13221612232 in words is "thirteen billion, two hundred twenty-one million, six hundred twelve thousand, two hundred thirty-two".