1222121232112 has 120 divisors (see below), whose sum is σ = 2803460567040. Its totient is φ = 514215926400.

The previous prime is 1222121232103. The next prime is 1222121232149. The reversal of 1222121232112 is 2112321212221.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 23 ways as a sum of consecutive naturals, for example, 937689 + ... + 1823047.

It is an arithmetic number, because the mean of its divisors is an integer number (23362171392).

Almost surely, 2^{1222121232112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222121232112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1401730283520).

1222121232112 is an abundant number, since it is smaller than the sum of its proper divisors (1581339334928).

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

1222121232112 is a wasteful number, since it uses less digits than its factorization.

1222121232112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885443 (or 885426 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

Adding to 1222121232112 its reverse (2112321212221), we get a palindrome (3334442444333).

The spelling of 1222121232112 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred thirty-two thousand, one hundred twelve".