111212231104 has 56 divisors (see below), whose sum is σ = 237819448160. Its totient is φ = 51294864384.

The previous prime is 111212231089. The next prime is 111212231107. The reversal of 111212231104 is 401132212111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212231107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1240462 + ... + 1327090.

It is an arithmetic number, because the mean of its divisors is an integer number (4246775860).

Almost surely, 2^111212231104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111212231104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118909724080).

111212231104 is an abundant number, since it is smaller than the sum of its proper divisors (126607217056).

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

111212231104 is a wasteful number, since it uses less digits than its factorization.

111212231104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88197 (or 88187 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 111212231104 its reverse (401132212111), we get a palindrome (512344443215).

The spelling of 111212231104 in words is "one hundred eleven billion, two hundred twelve million, two hundred thirty-one thousand, one hundred four".