221220111022200 has 144 divisors (see below), whose sum is σ = 742937421525000. Its totient is φ = 58991509612800.

The previous prime is 221220111022193. The next prime is 221220111022201. The reversal of 221220111022200 is 2220111022122.

It is a happy number.

221220111022200 is a `hidden beast` number, since 221 + 220 + 1 + 1 + 1 + 0 + 2 + 220 + 0 = 666.

It is a super-3 number, since 3×221220111022200³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220111022201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 231270915 + ... + 232225485.

Almost surely, 2^{221220111022200} is an apocalyptic number.

221220111022200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221220111022200 is an abundant number, since it is smaller than the sum of its proper divisors (521717310502800).

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

221220111022200 is a wasteful number, since it uses less digits than its factorization.

221220111022200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083342 (or 1083330 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221220111022200 its reverse (2220111022122), we get a palindrome (223440222044322).

The spelling of 221220111022200 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, twenty-two thousand, two hundred".