1111121222112 has 240 divisors, whose sum is σ = 3570450250752. Its totient is φ = 336174209280.

The previous prime is 1111121222111. The next prime is 1111121222131. The reversal of 1111121222112 is 2112221211111.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111121222111) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18302913 + ... + 18363519.

Almost surely, 2^{1111121222112} is an apocalyptic number.

1111121222112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111121222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785225125376).

1111121222112 is an abundant number, since it is smaller than the sum of its proper divisors (2459329028640).

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

1111121222112 is a wasteful number, since it uses less digits than its factorization.

1111121222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61283 (or 61266 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

Adding to 1111121222112 its reverse (2112221211111), we get a palindrome (3223342433223).

The spelling of 1111121222112 in words is "one trillion, one hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred twelve".