1211222212 has 12 divisors (see below), whose sum is σ = 2119883920. Its totient is φ = 605541096.

The previous prime is 1211222191. The next prime is 1211222213. The reversal of 1211222212 is 2122221121.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1211222213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52783 + ... + 72169.

Almost surely, 2^1211222212 is an apocalyptic number.

It is an amenable number.

1211222212 is a deficient number, since it is larger than the sum of its proper divisors (908661708).

1211222212 is a wasteful number, since it uses less digits than its factorization.

1211222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35010 (or 35008 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 1211222212 is about 34802.6178900381. The cubic root of 1211222212 is about 1065.9609016633.

Adding to 1211222212 its reverse (2122221121), we get a palindrome (3333443333).

The spelling of 1211222212 in words is "one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twelve".