221000110000 has 100 divisors (see below), whose sum is σ = 546448855392. Its totient is φ = 86519008000.

The previous prime is 221000109997. The next prime is 221000110027. The reversal of 221000110000 is 11000122.

It is a tau number, because it is divible by the number of its divisors (100).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 234894 + ... + 705106.

Almost surely, 2^221000110000 is an apocalyptic number.

221000110000 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 221000110000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273224427696).

221000110000 is an abundant number, since it is smaller than the sum of its proper divisors (325448745392).

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

221000110000 is an equidigital number, since it uses as much as digits as its factorization.

221000110000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470288 (or 470267 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 221000110000 its reverse (11000122), we get a palindrome (221011110122).

The spelling of 221000110000 in words is "two hundred twenty-one billion, one hundred ten thousand".