221133215600 has 60 divisors (see below), whose sum is σ = 579570066600. Its totient is φ = 80412076800.

The previous prime is 221133215579. The next prime is 221133215617. The reversal of 221133215600 is 6512331122.

It is a happy number.

221133215600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221133215600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25124375 + ... + 25133174.

It is an arithmetic number, because the mean of its divisors is an integer number (9659501110).

Almost surely, 2^221133215600 is an apocalyptic number.

221133215600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221133215600 is an abundant number, since it is smaller than the sum of its proper divisors (358436851000).

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

221133215600 is a wasteful number, since it uses less digits than its factorization.

221133215600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50257578 (or 50257567 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 221133215600 its reverse (6512331122), we get a palindrome (227645546722).

The spelling of 221133215600 in words is "two hundred twenty-one billion, one hundred thirty-three million, two hundred fifteen thousand, six hundred".