13221134412 has 12 divisors (see below), whose sum is σ = 30849313656. Its totient is φ = 4407044800.

The previous prime is 13221134411. The next prime is 13221134453. The reversal of 13221134412 is 21443112231.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (13221134411) 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, 550880589 + ... + 550880612.

It is an arithmetic number, because the mean of its divisors is an integer number (2570776138).

Almost surely, 2^13221134412 is an apocalyptic number.

13221134412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13221134412 is an abundant number, since it is smaller than the sum of its proper divisors (17628179244).

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

13221134412 is a wasteful number, since it uses less digits than its factorization.

13221134412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101761208 (or 1101761206 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 13221134412 its reverse (21443112231), we get a palindrome (34664246643).

The spelling of 13221134412 in words is "thirteen billion, two hundred twenty-one million, one hundred thirty-four thousand, four hundred twelve".