111001011021080 has 128 divisors (see below), whose sum is σ = 262277848903680. Its totient is φ = 42198992478720.

The previous prime is 111001011021079. The next prime is 111001011021127. The reversal of 111001011021080 is 80120110100111.

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, 117359822 + ... + 118301858.

It is an arithmetic number, because the mean of its divisors is an integer number (2049045694560).

Almost surely, 2^{111001011021080} is an apocalyptic number.

111001011021080 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 111001011021080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131138924451840).

111001011021080 is an abundant number, since it is smaller than the sum of its proper divisors (151276837882600).

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

111001011021080 is a wasteful number, since it uses less digits than its factorization.

111001011021080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942889 (or 942885 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111001011021080 its reverse (80120110100111), we get a palindrome (191121121121191).

The spelling of 111001011021080 in words is "one hundred eleven trillion, one billion, eleven million, twenty-one thousand, eighty".