221210221122200 has 96 divisors (see below), whose sum is σ = 516202773430320. Its totient is φ = 88159169280000.

The previous prime is 221210221122199. The next prime is 221210221122217. The reversal of 221210221122200 is 2221122012122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 503950820 + ... + 504389580.

Almost surely, 2^{221210221122200} is an apocalyptic number.

221210221122200 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 221210221122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258101386715160).

221210221122200 is an abundant number, since it is smaller than the sum of its proper divisors (294992552308120).

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

221210221122200 is a wasteful number, since it uses less digits than its factorization.

221210221122200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448029 (or 448020 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221210221122200 its reverse (2221122012122), we get a palindrome (223431343134322).

The spelling of 221210221122200 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred".