111020221000000 has 392 divisors, whose sum is σ = 297428367243168. Its totient is φ = 40872288000000.

The previous prime is 111020220999991. The next prime is 111020221000001. The reversal of 111020221000000 is 122020111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020221000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4510987695 + ... + 4511012305.

It is an arithmetic number, because the mean of its divisors is an integer number (758745834804).

Almost surely, 2^{111020221000000} is an apocalyptic number.

111020221000000 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 111020221000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148714183621584).

111020221000000 is an abundant number, since it is smaller than the sum of its proper divisors (186408146243168).

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

111020221000000 is an frugal number, since it uses more digits than its factorization.

111020221000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25013 (or 24978 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 111020221000000 its reverse (122020111), we get a palindrome (111020343020111).

The spelling of 111020221000000 in words is "one hundred eleven trillion, twenty billion, two hundred twenty-one million", and thus it is an aban number.