1211212120222 has 16 divisors (see below), whose sum is σ = 1965846293712. Its totient is φ = 556371587520.

The previous prime is 1211212120211. The next prime is 1211212120241. The reversal of 1211212120222 is 2220212121121.

It is a self number, because there is not a number n which added to its sum of digits gives 1211212120222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110385703 + ... + 110396674.

It is an arithmetic number, because the mean of its divisors is an integer number (122865393357).

Almost surely, 2^{1211212120222} is an apocalyptic number.

1211212120222 is a deficient number, since it is larger than the sum of its proper divisors (754634173490).

1211212120222 is a wasteful number, since it uses less digits than its factorization.

1211212120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220782603.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1211212120222 its reverse (2220212121121), we get a palindrome (3431424241343).

The spelling of 1211212120222 in words is "one trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty thousand, two hundred twenty-two".