13011232001 has 4 divisors (see below), whose sum is σ = 13031157972. Its totient is φ = 12991306032.

The previous prime is 13011231923. The next prime is 13011232007. The reversal of 13011232001 is 10023211031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7590591376 + 5420640625 = 87124^2 + 73625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13011232001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13011232007) 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, 9962006 + ... + 9963311.

It is an arithmetic number, because the mean of its divisors is an integer number (3257789493).

Almost surely, 2^13011232001 is an apocalyptic number.

It is an amenable number.

13011232001 is a deficient number, since it is larger than the sum of its proper divisors (19925971).

13011232001 is an equidigital number, since it uses as much as digits as its factorization.

13011232001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19925970.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 13011232001 its reverse (10023211031), we get a palindrome (23034443032).

The spelling of 13011232001 in words is "thirteen billion, eleven million, two hundred thirty-two thousand, one".