13033131221 has 4 divisors (see below), whose sum is σ = 14217961344. Its totient is φ = 11848301100.

The previous prime is 13033131179. The next prime is 13033131239. The reversal of 13033131221 is 12213133031.

13033131221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13033131221 - 2¹⁰ = 13033130197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13033131193 and 13033131202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13033131281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592415045 + ... + 592415066.

It is an arithmetic number, because the mean of its divisors is an integer number (3554490336).

Almost surely, 2^13033131221 is an apocalyptic number.

13033131221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13033131221 is a deficient number, since it is larger than the sum of its proper divisors (1184830123).

13033131221 is a wasteful number, since it uses less digits than its factorization.

13033131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184830122.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 13033131221 its reverse (12213133031), we get a palindrome (25246264252).

The spelling of 13033131221 in words is "thirteen billion, thirty-three million, one hundred thirty-one thousand, two hundred twenty-one".