12021122222 has 4 divisors (see below), whose sum is σ = 18031683336. Its totient is φ = 6010561110.

The previous prime is 12021122209. The next prime is 12021122233. The reversal of 12021122222 is 22222112021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22222112021 = 53551 ⋅414971.

It is a self number, because there is not a number n which added to its sum of digits gives 12021122222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3005280554 + ... + 3005280557.

It is an arithmetic number, because the mean of its divisors is an integer number (4507920834).

Almost surely, 2^12021122222 is an apocalyptic number.

12021122222 is a deficient number, since it is larger than the sum of its proper divisors (6010561114).

12021122222 is an equidigital number, since it uses as much as digits as its factorization.

12021122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6010561113.

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

Adding to 12021122222 its reverse (22222112021), we get a palindrome (34243234243).

The spelling of 12021122222 in words is "twelve billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty-two".