221132450450 has 54 divisors (see below), whose sum is σ = 417476135007. Its totient is φ = 87145531200.

The previous prime is 221132450449. The next prime is 221132450459. The reversal of 221132450450 is 54054231122.

221132450450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 94253298049 + 126879152401 = 307007^2 + 356201^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332515.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221132450459) 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 26 ways as a sum of consecutive naturals, for example, 242735495 + ... + 242736405.

Almost surely, 2^221132450450 is an apocalyptic number.

221132450450 is a deficient number, since it is larger than the sum of its proper divisors (196343684557).

221132450450 is an frugal number, since it uses more digits than its factorization.

221132450450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980 (or 991 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 221132450450 its reverse (54054231122), we get a palindrome (275186681572).

The spelling of 221132450450 in words is "two hundred twenty-one billion, one hundred thirty-two million, four hundred fifty thousand, four hundred fifty".