12231111121 has 4 divisors (see below), whose sum is σ = 12295148544. Its totient is φ = 12167073700.

The previous prime is 12231111107. The next prime is 12231111187. The reversal of 12231111121 is 12111113221.

It is a happy number.

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 12231111121 - 2⁷ = 12231110993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12231111095 and 12231111104.

It is not an unprimeable number, because it can be changed into a prime (12231111521) 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, 32018425 + ... + 32018806.

It is an arithmetic number, because the mean of its divisors is an integer number (3073787136).

Almost surely, 2^12231111121 is an apocalyptic number.

It is an amenable number.

12231111121 is a deficient number, since it is larger than the sum of its proper divisors (64037423).

12231111121 is an equidigital number, since it uses as much as digits as its factorization.

12231111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64037422.

The product of its digits is 24, while the sum is 16.

Adding to 12231111121 its reverse (12111113221), we get a palindrome (24342224342).

It can be divided in two parts, 122311 and 11121, that multiplied together give a palindrome (1360220631).

The spelling of 12231111121 in words is "twelve billion, two hundred thirty-one million, one hundred eleven thousand, one hundred twenty-one".