221100220000 has 240 divisors, whose sum is σ = 606042404352. Its totient is φ = 78685760000.

The previous prime is 221100219941. The next prime is 221100220007. The reversal of 221100220000 is 22001122.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221100220007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10329309 + ... + 10350691.

Almost surely, 2^221100220000 is an apocalyptic number.

221100220000 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 221100220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303021202176).

221100220000 is an abundant number, since it is smaller than the sum of its proper divisors (384942184352).

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

221100220000 is a wasteful number, since it uses less digits than its factorization.

221100220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21471 (or 21448 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 221100220000 its reverse (22001122), we get a palindrome (221122221122).

The spelling of 221100220000 in words is "two hundred twenty-one billion, one hundred million, two hundred twenty thousand".