1222121222 has 8 divisors (see below), whose sum is σ = 2095064976. Its totient is φ = 523766232.

The previous prime is 1222121207. The next prime is 1222121233. The reversal of 1222121222 is 2221212221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1222121222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43647173 + ... + 43647200.

It is an arithmetic number, because the mean of its divisors is an integer number (261883122).

Almost surely, 2^1222121222 is an apocalyptic number.

1222121222 is a deficient number, since it is larger than the sum of its proper divisors (872943754).

1222121222 is an equidigital number, since it uses as much as digits as its factorization.

1222121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87294382.

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

The square root of 1222121222 is about 34958.8504101608. The cubic root of 1222121222 is about 1069.1486581255.

Adding to 1222121222 its reverse (2221212221), we get a palindrome (3443333443).

Subtracting 1222121222 from its reverse (2221212221), we obtain a palindrome (999090999).

The spelling of 1222121222 in words is "one billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-two".