221011112111000 has 128 divisors (see below), whose sum is σ = 521174172879360. Its totient is φ = 87721142256000.

The previous prime is 221011112110991. The next prime is 221011112111033. The reversal of 221011112111000 is 111211110122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94198139 + ... + 96515861.

It is an arithmetic number, because the mean of its divisors is an integer number (4071673225620).

Almost surely, 2^{221011112111000} is an apocalyptic number.

221011112111000 is a gapful number since it is divisible by the number (20) 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 221011112111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260587086439680).

221011112111000 is an abundant number, since it is smaller than the sum of its proper divisors (300163060768360).

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

221011112111000 is a wasteful number, since it uses less digits than its factorization.

221011112111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318482 (or 2318468 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221011112111000 its reverse (111211110122), we get a palindrome (221122323221122).

The spelling of 221011112111000 in words is "two hundred twenty-one trillion, eleven billion, one hundred twelve million, one hundred eleven thousand".