221211111222200 has 96 divisors (see below), whose sum is σ = 561139569768960. Its totient is φ = 80430690633600.

The previous prime is 221211111222193. The next prime is 221211111222203. The reversal of 221211111222200 is 2222111112122.

221211111222200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211111222203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12164639 + ... + 24298161.

It is an arithmetic number, because the mean of its divisors is an integer number (5845203851760).

Almost surely, 2^{221211111222200} is an apocalyptic number.

221211111222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221211111222200 is an abundant number, since it is smaller than the sum of its proper divisors (339928458546760).

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

221211111222200 is a wasteful number, since it uses less digits than its factorization.

221211111222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12141837 (or 12141828 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221211111222200 its reverse (2222111112122), we get a palindrome (223433222334322).

The spelling of 221211111222200 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, two hundred".