12231121111 has 8 divisors (see below), whose sum is σ = 13653345024. Its totient is φ = 10860614520.

The previous prime is 12231121051. The next prime is 12231121129. The reversal of 12231121111 is 11112113221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12231121111 - 2¹³ = 12231112919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231121151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12928831 + ... + 12929776.

It is an arithmetic number, because the mean of its divisors is an integer number (1706668128).

Almost surely, 2^12231121111 is an apocalyptic number.

12231121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12231121111 is a deficient number, since it is larger than the sum of its proper divisors (1422223913).

12231121111 is a wasteful number, since it uses less digits than its factorization.

12231121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25858661.

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

Adding to 12231121111 its reverse (11112113221), we get a palindrome (23343234332).

The spelling of 12231121111 in words is "twelve billion, two hundred thirty-one million, one hundred twenty-one thousand, one hundred eleven".