111021312234 has 96 divisors (see below), whose sum is σ = 262235750400. Its totient is φ = 31237405920.

The previous prime is 111021312229. The next prime is 111021312251. The reversal of 111021312234 is 432213120111.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 111021312234.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 21685527 + ... + 21690645.

It is an arithmetic number, because the mean of its divisors is an integer number (2731622400).

Almost surely, 2^111021312234 is an apocalyptic number.

111021312234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111021312234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131117875200).

111021312234 is an abundant number, since it is smaller than the sum of its proper divisors (151214438166).

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

111021312234 is a wasteful number, since it uses less digits than its factorization.

111021312234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6248 (or 6241 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 111021312234 its reverse (432213120111), we get a palindrome (543234432345).

The spelling of 111021312234 in words is "one hundred eleven billion, twenty-one million, three hundred twelve thousand, two hundred thirty-four".