111221111000000 has 196 divisors, whose sum is σ = 275952148392288. Its totient is φ = 44476320000000.

The previous prime is 111221110999993. The next prime is 111221111000011. The reversal of 111221111000000 is 111122111.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4270986980 + ... + 4271013020.

Almost surely, 2^{111221111000000} is an apocalyptic number.

111221111000000 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 111221111000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137976074196144).

111221111000000 is an abundant number, since it is smaller than the sum of its proper divisors (164731037392288).

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

111221111000000 is an frugal number, since it uses more digits than its factorization.

111221111000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30354 (or 30319 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111221111000000 its reverse (111122111), we get a palindrome (111221222122111).

The spelling of 111221111000000 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred eleven million", and thus it is an aban number.