12011222222 has 4 divisors (see below), whose sum is σ = 18016833336. Its totient is φ = 6005611110.

The previous prime is 12011222221. The next prime is 12011222227. The reversal of 12011222222 is 22222211021.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12011222222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011222221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3002805554 + ... + 3002805557.

It is an arithmetic number, because the mean of its divisors is an integer number (4504208334).

Almost surely, 2^12011222222 is an apocalyptic number.

12011222222 is a deficient number, since it is larger than the sum of its proper divisors (6005611114).

12011222222 is an equidigital number, since it uses as much as digits as its factorization.

12011222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6005611113.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12011222222 its reverse (22222211021), we get a palindrome (34233433243).

The spelling of 12011222222 in words is "twelve billion, eleven million, two hundred twenty-two thousand, two hundred twenty-two".