110001221000 has 192 divisors, whose sum is σ = 285763448880. Its totient is φ = 39600000000.

The previous prime is 110001220999. The next prime is 110001221021. The reversal of 110001221000 is 122100011.

It can be written as a sum of positive squares in 8 ways, for example, as 9485591236 + 100515629764 = 97394^2 + 317042^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12216500 + ... + 12225500.

Almost surely, 2^110001221000 is an apocalyptic number.

110001221000 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 110001221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142881724440).

110001221000 is an abundant number, since it is smaller than the sum of its proper divisors (175762227880).

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

110001221000 is a wasteful number, since it uses less digits than its factorization.

110001221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9145 (or 9120 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 110001221000 its reverse (122100011), we get a palindrome (110123321011).

The spelling of 110001221000 in words is "one hundred ten billion, one million, two hundred twenty-one thousand".