221200221000 has 512 divisors, whose sum is σ = 784033136640. Its totient is φ = 51865440000.

The previous prime is 221200220971. The next prime is 221200221013. The reversal of 221200221000 is 122002122.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 123782107 + ... + 123783893.

It is an arithmetic number, because the mean of its divisors is an integer number (1531314720).

Almost surely, 2^221200221000 is an apocalyptic number.

221200221000 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 221200221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392016568320).

221200221000 is an abundant number, since it is smaller than the sum of its proper divisors (562832915640).

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

221200221000 is a wasteful number, since it uses less digits than its factorization.

221200221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875 (or 1839 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 221200221000 its reverse (122002122), we get a palindrome (221322223122).

The spelling of 221200221000 in words is "two hundred twenty-one billion, two hundred million, two hundred twenty-one thousand".