221244204123 has 12 divisors (see below), whose sum is σ = 330594788160. Its totient is φ = 142410062256.

The previous prime is 221244204101. The next prime is 221244204131. The reversal of 221244204123 is 321402442122.

It is a happy number.

221244204123 is a `hidden beast` number, since 2 + 2 + 1 + 244 + 2 + 0 + 412 + 3 = 666.

221244204123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221244204123 - 2⁵ = 221244204091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221244204163) by changing a digit.

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, 423839211 + ... + 423839732.

It is an arithmetic number, because the mean of its divisors is an integer number (27549565680).

Almost surely, 2^221244204123 is an apocalyptic number.

221244204123 is a deficient number, since it is larger than the sum of its proper divisors (109350584037).

221244204123 is a wasteful number, since it uses less digits than its factorization.

221244204123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847678978 (or 847678975 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 221244204123 its reverse (321402442122), we get a palindrome (542646646245).

The spelling of 221244204123 in words is "two hundred twenty-one billion, two hundred forty-four million, two hundred four thousand, one hundred twenty-three".