1212122222 has 32 divisors (see below), whose sum is σ = 1914403680. Its totient is φ = 574801920.

The previous prime is 1212122213. The next prime is 1212122269. The reversal of 1212122222 is 2222212121.

It is a happy number.

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 1212122222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1494197 + ... + 1495007.

It is an arithmetic number, because the mean of its divisors is an integer number (59825115).

Almost surely, 2^1212122222 is an apocalyptic number.

1212122222 is a deficient number, since it is larger than the sum of its proper divisors (702281458).

1212122222 is a wasteful number, since it uses less digits than its factorization.

1212122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268.

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

The square root of 1212122222 is about 34815.5456944165. The cubic root of 1212122222 is about 1066.2248603697.

Adding to 1212122222 its reverse (2222212121), we get a palindrome (3434334343).

It can be divided in two parts, 12121 and 22222, that added together give a palindrome (34343).

The spelling of 1212122222 in words is "one billion, two hundred twelve million, one hundred twenty-two thousand, two hundred twenty-two".