1211222223212 has 6 divisors (see below), whose sum is σ = 2119638890628. Its totient is φ = 605611111604.

The previous prime is 1211222223203. The next prime is 1211222223217. The reversal of 1211222223212 is 2123222221121.

It is not an unprimeable number, because it can be changed into a prime (1211222223217) by changing a digit.

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 as a sum of consecutive naturals, namely, 151402777898 + ... + 151402777905.

It is an arithmetic number, because the mean of its divisors is an integer number (353273148438).

Almost surely, 2^{1211222223212} is an apocalyptic number.

It is an amenable number.

1211222223212 is a deficient number, since it is larger than the sum of its proper divisors (908416667416).

1211222223212 is a wasteful number, since it uses less digits than its factorization.

1211222223212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302805555807 (or 302805555805 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

Adding to 1211222223212 its reverse (2123222221121), we get a palindrome (3334444444333).

The spelling of 1211222223212 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twenty-three thousand, two hundred twelve".