12321321111121 has 16 divisors (see below), whose sum is σ = 14162025047040. Its totient is φ = 10610170963920.

The previous prime is 12321321111101. The next prime is 12321321111163. The reversal of 12321321111121 is 12111112312321.

It is not a de Polignac number, because 12321321111121 - 2¹⁷ = 12321320980049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12321321111092 and 12321321111101.

It is not an unprimeable number, because it can be changed into a prime (12321321111101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236385951 + ... + 236438068.

It is an arithmetic number, because the mean of its divisors is an integer number (885126565440).

Almost surely, 2^{12321321111121} is an apocalyptic number.

12321321111121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12321321111121 is a deficient number, since it is larger than the sum of its proper divisors (1840703935919).

12321321111121 is a wasteful number, since it uses less digits than its factorization.

12321321111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472824156.

The product of its digits is 144, while the sum is 22.

Adding to 12321321111121 its reverse (12111112312321), we get a palindrome (24432433423442).

The spelling of 12321321111121 in words is "twelve trillion, three hundred twenty-one billion, three hundred twenty-one million, one hundred eleven thousand, one hundred twenty-one".