1122121121212 has 144 divisors (see below), whose sum is σ = 2469050476032. Its totient is φ = 436825509120.

The previous prime is 1122121121207. The next prime is 1122121121287. The reversal of 1122121121212 is 2121211212211.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1122121121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 580506598 + ... + 580508530.

Almost surely, 2^{1122121121212} 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 1122121121212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1234525238016).

1122121121212 is an abundant number, since it is smaller than the sum of its proper divisors (1346929354820).

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

1122121121212 is a wasteful number, since it uses less digits than its factorization.

1122121121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3868 (or 3853 counting only the distinct ones).

The product of its digits is 64, while the sum is 19.

Adding to 1122121121212 its reverse (2121211212211), we get a palindrome (3243332333423).

Subtracting 1122121121212 from its reverse (2121211212211), we obtain a palindrome (999090090999).

The spelling of 1122121121212 in words is "one trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".