221220222111100 has 18 divisors (see below), whose sum is σ = 480047881981304. Its totient is φ = 88488088844400.

The previous prime is 221220222111023. The next prime is 221220222111101. The reversal of 221220222111100 is 1111222022122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220222111101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1106101110456 + ... + 1106101110655.

Almost surely, 2^{221220222111100} is an apocalyptic number.

221220222111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221220222111100 is an abundant number, since it is smaller than the sum of its proper divisors (258827659870204).

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

221220222111100 is a wasteful number, since it uses less digits than its factorization.

221220222111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212202221125 (or 2212202221118 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221220222111100 its reverse (1111222022122), we get a palindrome (222331444133222).

The spelling of 221220222111100 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, one hundred eleven thousand, one hundred".