111212211100000 has 144 divisors (see below), whose sum is σ = 273707736271200. Its totient is φ = 44478552960000.

The previous prime is 111212211099967. The next prime is 111212211100027. The reversal of 111212211100000 is 1112212111.

It is a happy number.

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, 736824541 + ... + 736975459.

It is an arithmetic number, because the mean of its divisors is an integer number (1900748168550).

Almost surely, 2^{111212211100000} is an apocalyptic number.

111212211100000 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 111212211100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136853868135600).

111212211100000 is an abundant number, since it is smaller than the sum of its proper divisors (162495525171200).

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

111212211100000 is an frugal number, since it uses more digits than its factorization.

111212211100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158323 (or 158295 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111212211100000 its reverse (1112212111), we get a palindrome (111213323312111).

The spelling of 111212211100000 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred eleven million, one hundred thousand".