13001321232 has 80 divisors (see below), whose sum is σ = 38112679680. Its totient is φ = 4241559168.

The previous prime is 13001321213. The next prime is 13001321233. The reversal of 13001321232 is 23212310031.

13001321232 is a `hidden beast` number, since 1 + 300 + 132 + 1 + 232 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (13001321233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299863 + ... + 340470.

It is an arithmetic number, because the mean of its divisors is an integer number (476408496).

Almost surely, 2^13001321232 is an apocalyptic number.

13001321232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13001321232 is an abundant number, since it is smaller than the sum of its proper divisors (25111358448).

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

13001321232 is a wasteful number, since it uses less digits than its factorization.

13001321232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640397 (or 640385 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13001321232 its reverse (23212310031), we get a palindrome (36213631263).

The spelling of 13001321232 in words is "thirteen billion, one million, three hundred twenty-one thousand, two hundred thirty-two".