221145355301 has 4 divisors (see below), whose sum is σ = 238156536492. Its totient is φ = 204134174112.

The previous prime is 221145355279. The next prime is 221145355337. The reversal of 221145355301 is 103553541122.

221145355301 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21528519076 + 199616836225 = 146726^2 + 446785^2 .

It is a cyclic number.

It is not a de Polignac number, because 221145355301 - 2¹⁰ = 221145354277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221145355381) 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 3 ways as a sum of consecutive naturals, for example, 8505590576 + ... + 8505590601.

It is an arithmetic number, because the mean of its divisors is an integer number (59539134123).

Almost surely, 2^221145355301 is an apocalyptic number.

It is an amenable number.

221145355301 is a deficient number, since it is larger than the sum of its proper divisors (17011181191).

221145355301 is a wasteful number, since it uses less digits than its factorization.

221145355301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17011181190.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 221145355301 its reverse (103553541122), we get a palindrome (324698896423).

The spelling of 221145355301 in words is "two hundred twenty-one billion, one hundred forty-five million, three hundred fifty-five thousand, three hundred one".