1212112220222 has 16 divisors (see below), whose sum is σ = 1897244134560. Its totient is φ = 579698203392.

The previous prime is 1212112220203. The next prime is 1212112220257. The reversal of 1212112220222 is 2220222112121.

It is a junction number, because it is equal to n+sod(n) for n = 1212112220194 and 1212112220203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5032154 + ... + 5267522.

It is an arithmetic number, because the mean of its divisors is an integer number (118577758410).

Almost surely, 2^{1212112220222} is an apocalyptic number.

1212112220222 is a deficient number, since it is larger than the sum of its proper divisors (685131914338).

1212112220222 is a wasteful number, since it uses less digits than its factorization.

1212112220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347347.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1212112220222 its reverse (2220222112121), we get a palindrome (3432334332343).

The spelling of 1212112220222 in words is "one trillion, two hundred twelve billion, one hundred twelve million, two hundred twenty thousand, two hundred twenty-two".