12111822 has 32 divisors (see below), whose sum is σ = 27068160. Its totient is φ = 4014360.

The previous prime is 12111817. The next prime is 12111829. The reversal of 12111822 is 22811121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12111795 and 12111804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111829) 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, 10863 + ... + 11925.

It is an arithmetic number, because the mean of its divisors is an integer number (845880).

Almost surely, 2^12111822 is an apocalyptic number.

12111822 is an abundant number, since it is smaller than the sum of its proper divisors (14956338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12111822 is a wasteful number, since it uses less digits than its factorization.

12111822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285 (or 1279 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

The square root of 12111822 is about 3480.2043043477. The cubic root of 12111822 is about 229.6517856174.

Adding to 12111822 its reverse (22811121), we get a palindrome (34922943).

The spelling of 12111822 in words is "twelve million, one hundred eleven thousand, eight hundred twenty-two".