221221120203 has 6 divisors (see below), whose sum is σ = 319541618084. Its totient is φ = 147480746796.

The previous prime is 221221120199. The next prime is 221221120217. The reversal of 221221120203 is 302021122122.

221221120203 is a `hidden beast` number, since 221 + 221 + 1 + 20 + 203 = 666.

221221120203 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 221221120203 - 2² = 221221120199 is a prime.

It is a super-2 number, since 2×221221120203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221120273) 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 5 ways as a sum of consecutive naturals, for example, 12290062225 + ... + 12290062242.

Almost surely, 2^221221120203 is an apocalyptic number.

221221120203 is a deficient number, since it is larger than the sum of its proper divisors (98320497881).

221221120203 is a wasteful number, since it uses less digits than its factorization.

221221120203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24580124473 (or 24580124470 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221221120203 its reverse (302021122122), we get a palindrome (523242242325).

The spelling of 221221120203 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, two hundred three".