221172354050 has 18 divisors (see below), whose sum is σ = 411386763963. Its totient is φ = 88467611440.

The previous prime is 221172353867. The next prime is 221172354059. The reversal of 221172354050 is 50453271122.

221172354050 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 164238099169 + 56934254881 = 405263^2 + 238609^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332545.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221172353998 and 221172354016.

It is not an unprimeable number, because it can be changed into a prime (221172354059) 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 8 ways as a sum of consecutive naturals, for example, 3292196 + ... + 3358704.

Almost surely, 2^221172354050 is an apocalyptic number.

221172354050 is a deficient number, since it is larger than the sum of its proper divisors (190214409913).

221172354050 is an frugal number, since it uses more digits than its factorization.

221172354050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133030 (or 66516 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

Multiplying 221172354050 by its sum of digits (32), we get a square (7077515329600 = 2660360²).

The spelling of 221172354050 in words is "two hundred twenty-one billion, one hundred seventy-two million, three hundred fifty-four thousand, fifty".