1222121211212 has 24 divisors (see below), whose sum is σ = 2356240903632. Its totient is φ = 550009544000.

The previous prime is 1222121211211. The next prime is 1222121211239. The reversal of 1222121211212 is 2121121212221.

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 (1222121211211) 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 in 7 ways as a sum of consecutive naturals, for example, 137497943 + ... + 137506830.

It is an arithmetic number, because the mean of its divisors is an integer number (98176704318).

Almost surely, 2^{1222121211212} is an apocalyptic number.

It is an amenable number.

1222121211212 is a deficient number, since it is larger than the sum of its proper divisors (1134119692420).

1222121211212 is a wasteful number, since it uses less digits than its factorization.

1222121211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275004889 (or 275004887 counting only the distinct ones).

The product of its digits is 128, while the sum is 20.

Adding to 1222121211212 its reverse (2121121212221), we get a palindrome (3343242423433).

The spelling of 1222121211212 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twelve".