111212212110 has 128 divisors (see below), whose sum is σ = 298452833280. Its totient is φ = 26376615936.

The previous prime is 111212212109. The next prime is 111212212129. The reversal of 111212212110 is 11212212111.

It is a happy number.

111212212110 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×111212212110² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111212212110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 916476 + ... + 1030704.

It is an arithmetic number, because the mean of its divisors is an integer number (2331662760).

Almost surely, 2^111212212110 is an apocalyptic number.

111212212110 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 111212212110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149226416640).

111212212110 is an abundant number, since it is smaller than the sum of its proper divisors (187240621170).

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

111212212110 is a wasteful number, since it uses less digits than its factorization.

111212212110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114362.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111212212110 its reverse (11212212111), we get a palindrome (122424424221).

Subtracting from 111212212110 its reverse (11212212111), we obtain a palindrome (99999999999).

The spelling of 111212212110 in words is "one hundred eleven billion, two hundred twelve million, two hundred twelve thousand, one hundred ten".