13221001201 has 12 divisors (see below), whose sum is σ = 14173336540. Its totient is φ = 12329107200.

The previous prime is 13221001187. The next prime is 13221001229. The reversal of 13221001201 is 10210012231.

It can be written as a sum of positive squares in 6 ways, for example, as 3660855025 + 9560146176 = 60505^2 + 97776^2 .

It is not a de Polignac number, because 13221001201 - 2¹¹ = 13220999153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13221001301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178350 + ... + 241351.

Almost surely, 2^13221001201 is an apocalyptic number.

It is an amenable number.

13221001201 is a deficient number, since it is larger than the sum of its proper divisors (952335339).

13221001201 is a wasteful number, since it uses less digits than its factorization.

13221001201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419844 (or 419827 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 13221001201 its reverse (10210012231), we get a palindrome (23431013432).

The spelling of 13221001201 in words is "thirteen billion, two hundred twenty-one million, one thousand, two hundred one".