1212222122 has 4 divisors (see below), whose sum is σ = 1818333186. Its totient is φ = 606111060.

The previous prime is 1212222091. The next prime is 1212222133. The reversal of 1212222122 is 2212222121.

It is a happy number.

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., 847450321 + 364771801 = 29111^2 + 19099^2 .

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 1212222122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303055529 + ... + 303055532.

Almost surely, 2^1212222122 is an apocalyptic number.

1212222122 is a deficient number, since it is larger than the sum of its proper divisors (606111064).

1212222122 is an equidigital number, since it uses as much as digits as its factorization.

1212222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606111063.

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

The square root of 1212222122 is about 34816.9803687798. The cubic root of 1212222122 is about 1066.2541514031.

Adding to 1212222122 its reverse (2212222121), we get a palindrome (3424444243).

Subtracting 1212222122 from its reverse (2212222121), we obtain a palindrome (999999999).

The spelling of 1212222122 in words is "one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-two".