13234405540221 has 12 divisors (see below), whose sum is σ = 19119054958848. Its totient is φ = 8821694841864.

The previous prime is 13234405540217. The next prime is 13234405540243. The reversal of 13234405540221 is 12204550443231.

It is a happy number.

13234405540221 is a `hidden beast` number, since 1 + 3 + 2 + 344 + 0 + 55 + 40 + 221 = 666.

It is not a de Polignac number, because 13234405540221 - 2² = 13234405540217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13234405544221) 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, 103447935 + ... + 103575788.

It is an arithmetic number, because the mean of its divisors is an integer number (1593254579904).

Almost surely, 2^{13234405540221} is an apocalyptic number.

It is an amenable number.

13234405540221 is a deficient number, since it is larger than the sum of its proper divisors (5884649418627).

13234405540221 is a wasteful number, since it uses less digits than its factorization.

13234405540221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207030832 (or 207030829 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 13234405540221 its reverse (12204550443231), we get a palindrome (25438955983452).

The spelling of 13234405540221 in words is "thirteen trillion, two hundred thirty-four billion, four hundred five million, five hundred forty thousand, two hundred twenty-one".