13032032221 has 4 divisors (see below), whose sum is σ = 14034496252. Its totient is φ = 12029568192.

The previous prime is 13032032183. The next prime is 13032032239. The reversal of 13032032221 is 12223023031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12223023031 = 1741 ⋅7020691.

It can be written as a sum of positive squares in 2 ways, for example, as 2420148025 + 10611884196 = 49195^2 + 103014^2 .

It is a cyclic number.

It is not a de Polignac number, because 13032032221 - 2⁹ = 13032031709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13032032521) 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, 501231996 + ... + 501232021.

It is an arithmetic number, because the mean of its divisors is an integer number (3508624063).

Almost surely, 2^13032032221 is an apocalyptic number.

It is an amenable number.

13032032221 is a deficient number, since it is larger than the sum of its proper divisors (1002464031).

13032032221 is a wasteful number, since it uses less digits than its factorization.

13032032221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002464030.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 13032032221 its reverse (12223023031), we get a palindrome (25255055252).

The spelling of 13032032221 in words is "thirteen billion, thirty-two million, thirty-two thousand, two hundred twenty-one".