1122222221112 has 64 divisors (see below), whose sum is σ = 2852504035200. Its totient is φ = 367818387840.

The previous prime is 1122222221111. The next prime is 1122222221119. The reversal of 1122222221112 is 2111222222211.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122222221111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4292863 + ... + 4546769.

It is an arithmetic number, because the mean of its divisors is an integer number (44570375550).

Almost surely, 2^{1122222221112} is an apocalyptic number.

1122222221112 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 1122222221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1426252017600).

1122222221112 is an abundant number, since it is smaller than the sum of its proper divisors (1730281814088).

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

1122222221112 is a wasteful number, since it uses less digits than its factorization.

1122222221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256996 (or 256992 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

Adding to 1122222221112 its reverse (2111222222211), we get a palindrome (3233444443323).

The spelling of 1122222221112 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twelve".