1121223121110 has 96 divisors (see below), whose sum is σ = 2963241403200. Its totient is φ = 294102445824.

The previous prime is 1121223121061. The next prime is 1121223121127. The reversal of 1121223121110 is 111213221211.

It is a happy number.

1121223121110 is a `hidden beast` number, since 1 + 1 + 212 + 231 + 211 + 10 = 666.

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

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 47 ways as a sum of consecutive naturals, for example, 975352 + ... + 1787108.

It is an arithmetic number, because the mean of its divisors is an integer number (30867097950).

Almost surely, 2^{1121223121110} is an apocalyptic number.

1121223121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121223121110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1481620701600).

1121223121110 is an abundant number, since it is smaller than the sum of its proper divisors (1842018282090).

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

1121223121110 is a wasteful number, since it uses less digits than its factorization.

1121223121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812022 (or 812019 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1121223121110 its reverse (111213221211), we get a palindrome (1232436342321).

The spelling of 1121223121110 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-three million, one hundred twenty-one thousand, one hundred ten".