13204231351121 has 4 divisors (see below), whose sum is σ = 13204248890352. Its totient is φ = 13204213811892.

The previous prime is 13204231351099. The next prime is 13204231351231. The reversal of 13204231351121 is 12115313240231.

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 13204231351121 - 2¹⁰ = 13204231350097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13204231351321) 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, 7587215 + ... + 9163748.

It is an arithmetic number, because the mean of its divisors is an integer number (3301062222588).

Almost surely, 2^{13204231351121} is an apocalyptic number.

It is an amenable number.

13204231351121 is a deficient number, since it is larger than the sum of its proper divisors (17539231).

13204231351121 is an equidigital number, since it uses as much as digits as its factorization.

13204231351121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17539230.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 13204231351121 its reverse (12115313240231), we get a palindrome (25319544591352).

The spelling of 13204231351121 in words is "thirteen trillion, two hundred four billion, two hundred thirty-one million, three hundred fifty-one thousand, one hundred twenty-one".