1222212120012 has 96 divisors (see below), whose sum is σ = 3412763289600. Its totient is φ = 376030092096.

The previous prime is 1222212120011. The next prime is 1222212120029. The reversal of 1222212120012 is 2100212122221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1222212120011) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 17738853 + ... + 17807619.

It is an arithmetic number, because the mean of its divisors is an integer number (35549617600).

Almost surely, 2^{1222212120012} is an apocalyptic number.

1222212120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222212120012 is an abundant number, since it is smaller than the sum of its proper divisors (2190551169588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222212120012 is a wasteful number, since it uses less digits than its factorization.

1222212120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81452 (or 81444 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1222212120012 its reverse (2100212122221), we get a palindrome (3322424242233).

The spelling of 1222212120012 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, one hundred twenty thousand, twelve".