13231221201 has 48 divisors (see below), whose sum is σ = 22343817600. Its totient is φ = 7462920960.

The previous prime is 13231221191. The next prime is 13231221221. The reversal of 13231221201 is 10212213231.

13231221201 is a `hidden beast` number, since 13 + 231 + 221 + 201 = 666.

It is not a de Polignac number, because 13231221201 - 2⁵ = 13231221169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13231221221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5725 + ... + 162773.

It is an arithmetic number, because the mean of its divisors is an integer number (465496200).

Almost surely, 2^13231221201 is an apocalyptic number.

13231221201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13231221201 is a deficient number, since it is larger than the sum of its proper divisors (9112596399).

13231221201 is a wasteful number, since it uses less digits than its factorization.

13231221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157126 (or 157123 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 13231221201 its reverse (10212213231), we get a palindrome (23443434432).

It can be divided in two parts, 13231 and 221201, that added together give a palindrome (234432).

The spelling of 13231221201 in words is "thirteen billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred one".