221120201000 has 64 divisors (see below), whose sum is σ = 518207976000. Its totient is φ = 88313601600.

The previous prime is 221120200907. The next prime is 221120201039. The reversal of 221120201000 is 102021122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491231 + ... + 826769.

It is an arithmetic number, because the mean of its divisors is an integer number (8096999625).

Almost surely, 2^221120201000 is an apocalyptic number.

221120201000 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 221120201000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259103988000).

221120201000 is an abundant number, since it is smaller than the sum of its proper divisors (297087775000).

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

221120201000 is a wasteful number, since it uses less digits than its factorization.

221120201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336219 (or 336205 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221120201000 its reverse (102021122), we get a palindrome (221222222122).

The spelling of 221120201000 in words is "two hundred twenty-one billion, one hundred twenty million, two hundred one thousand".