1121122221222 has 16 divisors (see below), whose sum is σ = 2249454235392. Its totient is φ = 372505774920.

The previous prime is 1121122221217. The next prime is 1121122221253. The reversal of 1121122221222 is 2221222211211.

It is a super-2 number, since 2×1121122221222² (a number of 25 digits) contains 22 as substring.

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

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 7 ways as a sum of consecutive naturals, for example, 300406018 + ... + 300409749.

It is an arithmetic number, because the mean of its divisors is an integer number (140590889712).

Almost surely, 2^{1121122221222} is an apocalyptic number.

1121122221222 is an abundant number, since it is smaller than the sum of its proper divisors (1128332014170).

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

1121122221222 is a wasteful number, since it uses less digits than its factorization.

1121122221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600816083.

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

Adding to 1121122221222 its reverse (2221222211211), we get a palindrome (3342344432433).

The spelling of 1121122221222 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-two".