12212431111 has 4 divisors (see below), whose sum is σ = 12212652424. Its totient is φ = 12212209800.

The previous prime is 12212431079. The next prime is 12212431139. The reversal of 12212431111 is 11113421221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12212431111 - 2⁵ = 12212431079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212431211) 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, 46801 + ... + 163141.

It is an arithmetic number, because the mean of its divisors is an integer number (3053163106).

Almost surely, 2^12212431111 is an apocalyptic number.

12212431111 is a deficient number, since it is larger than the sum of its proper divisors (221313).

12212431111 is a wasteful number, since it uses less digits than its factorization.

12212431111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221312.

The product of its digits is 96, while the sum is 19.

Adding to 12212431111 its reverse (11113421221), we get a palindrome (23325852332).

The spelling of 12212431111 in words is "twelve billion, two hundred twelve million, four hundred thirty-one thousand, one hundred eleven".