13121212422321 has 12 divisors (see below), whose sum is σ = 18952894366848. Its totient is φ = 8747460188664.

The previous prime is 13121212422289. The next prime is 13121212422337. The reversal of 13121212422321 is 12322421212131.

13121212422321 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 1 + 212 + 422 + 3 + 21 = 666.

13121212422321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13121212422321 - 2⁵ = 13121212422289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13121212422361) 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, 8228836 + ... + 9693098.

It is an arithmetic number, because the mean of its divisors is an integer number (1579407863904).

Almost surely, 2^{13121212422321} is an apocalyptic number.

It is an amenable number.

13121212422321 is a deficient number, since it is larger than the sum of its proper divisors (5831681944527).

13121212422321 is a wasteful number, since it uses less digits than its factorization.

13121212422321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459932 (or 2459929 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

Adding to 13121212422321 its reverse (12322421212131), we get a palindrome (25443633634452).

The spelling of 13121212422321 in words is "thirteen trillion, one hundred twenty-one billion, two hundred twelve million, four hundred twenty-two thousand, three hundred twenty-one".