1011223231100 has 72 divisors (see below), whose sum is σ = 2213179128720. Its totient is φ = 401030622720.

The previous prime is 1011223231093. The next prime is 1011223231231. The reversal of 1011223231100 is 11323221101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7104431 + ... + 7245369.

It is an arithmetic number, because the mean of its divisors is an integer number (30738599010).

Almost surely, 2^{1011223231100} is an apocalyptic number.

1011223231100 is a gapful number since it is divisible by the number (10) 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 1011223231100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1106589564360).

1011223231100 is an abundant number, since it is smaller than the sum of its proper divisors (1201955897620).

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

1011223231100 is a wasteful number, since it uses less digits than its factorization.

1011223231100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141567 (or 141560 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1011223231100 its reverse (11323221101), we get a palindrome (1022546452201).

Subtracting from 1011223231100 its reverse (11323221101), we obtain a palindrome (999900009999).

The spelling of 1011223231100 in words is "one trillion, eleven billion, two hundred twenty-three million, two hundred thirty-one thousand, one hundred".