13542231221 has 8 divisors (see below), whose sum is σ = 13735073088. Its totient is φ = 13349448000.

The previous prime is 13542231191. The next prime is 13542231233. The reversal of 13542231221 is 12213224531.

13542231221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13542231221 - 2¹⁰ = 13542230197 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 (13542236221) 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 7 ways as a sum of consecutive naturals, for example, 686861 + ... + 706301.

It is an arithmetic number, because the mean of its divisors is an integer number (1716884136).

Almost surely, 2^13542231221 is an apocalyptic number.

It is an amenable number.

13542231221 is a deficient number, since it is larger than the sum of its proper divisors (192841867).

13542231221 is an equidigital number, since it uses as much as digits as its factorization.

13542231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29323.

The product of its digits is 2880, while the sum is 26.

Adding to 13542231221 its reverse (12213224531), we get a palindrome (25755455752).

The spelling of 13542231221 in words is "thirteen billion, five hundred forty-two million, two hundred thirty-one thousand, two hundred twenty-one".