220221121000 has 64 divisors (see below), whose sum is σ = 516803302080. Its totient is φ = 87834452800.

The previous prime is 220221120989. The next prime is 220221121031. The reversal of 220221121000 is 121122022.

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, 29679 + ... + 664321.

It is an arithmetic number, because the mean of its divisors is an integer number (8075051595).

Almost surely, 2^220221121000 is an apocalyptic number.

220221121000 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 220221121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258401651040).

220221121000 is an abundant number, since it is smaller than the sum of its proper divisors (296582181080).

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

220221121000 is a wasteful number, since it uses less digits than its factorization.

220221121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635011 (or 634997 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 220221121000 its reverse (121122022), we get a palindrome (220342243022).

The spelling of 220221121000 in words is "two hundred twenty billion, two hundred twenty-one million, one hundred twenty-one thousand".