12111121131321 has 4 divisors (see below), whose sum is σ = 16148161508432. Its totient is φ = 8074080754212.

The previous prime is 12111121131293. The next prime is 12111121131323. The reversal of 12111121131321 is 12313112111121.

12111121131321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 12111121131321 - 2³⁹ = 11561365317433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111121131323) 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, 2018520188551 + ... + 2018520188556.

It is an arithmetic number, because the mean of its divisors is an integer number (4037040377108).

Almost surely, 2^{12111121131321} is an apocalyptic number.

It is an amenable number.

12111121131321 is a deficient number, since it is larger than the sum of its proper divisors (4037040377111).

12111121131321 is an equidigital number, since it uses as much as digits as its factorization.

12111121131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037040377110.

The product of its digits is 72, while the sum is 21.

Adding to 12111121131321 its reverse (12313112111121), we get a palindrome (24424233242442).

The spelling of 12111121131321 in words is "twelve trillion, one hundred eleven billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred twenty-one".