1222211011212 has 72 divisors (see below), whose sum is σ = 3243191777280. Its totient is φ = 387579195360.

The previous prime is 1222211011211. The next prime is 1222211011253. The reversal of 1222211011212 is 2121101122221.

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 (1222211011211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9215268 + ... + 9346955.

It is an arithmetic number, because the mean of its divisors is an integer number (45044330240).

Almost surely, 2^{1222211011212} is an apocalyptic number.

1222211011212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222211011212 is an abundant number, since it is smaller than the sum of its proper divisors (2020980766068).

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

1222211011212 is a wasteful number, since it uses less digits than its factorization.

1222211011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18562323 (or 18562318 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1222211011212 its reverse (2121101122221), we get a palindrome (3343312133433).

The spelling of 1222211011212 in words is "one trillion, two hundred twenty-two billion, two hundred eleven million, eleven thousand, two hundred twelve".