111221022000 has 640 divisors, whose sum is σ = 415731962880. Its totient is φ = 25508736000.

The previous prime is 111221021971. The next prime is 111221022043. The reversal of 111221022000 is 220122111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 151733634 + ... + 151734366.

It is an arithmetic number, because the mean of its divisors is an integer number (649581192).

Almost surely, 2^111221022000 is an apocalyptic number.

111221022000 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 111221022000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207865981440).

111221022000 is an abundant number, since it is smaller than the sum of its proper divisors (304510940880).

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

111221022000 is a wasteful number, since it uses less digits than its factorization.

111221022000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 111221022000 its reverse (220122111), we get a palindrome (111441144111).

The spelling of 111221022000 in words is "one hundred eleven billion, two hundred twenty-one million, twenty-two thousand".