12111222222122 has 4 divisors (see below), whose sum is σ = 18166833333186. Its totient is φ = 6055611111060.

The previous prime is 12111222222109. The next prime is 12111222222137. The reversal of 12111222222122 is 22122222211121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10222222122841 + 1889000099281 = 3197221^2 + 1374409^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3027805555529 + ... + 3027805555532.

Almost surely, 2^{12111222222122} is an apocalyptic number.

12111222222122 is a deficient number, since it is larger than the sum of its proper divisors (6055611111064).

12111222222122 is an equidigital number, since it uses as much as digits as its factorization.

12111222222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6055611111063.

The product of its digits is 512, while the sum is 23.

Adding to 12111222222122 its reverse (22122222211121), we get a palindrome (34233444433243).

The spelling of 12111222222122 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-two".