221541216230101 has 4 divisors (see below), whose sum is σ = 223692101824672. Its totient is φ = 219390330635532.

The previous prime is 221541216230063. The next prime is 221541216230119. The reversal of 221541216230101 is 101032612145122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221541216230101 - 2¹⁵ = 221541216197333 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 (221541216230141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1075442797131 + ... + 1075442797336.

It is an arithmetic number, because the mean of its divisors is an integer number (55923025456168).

Almost surely, 2^{221541216230101} is an apocalyptic number.

It is an amenable number.

221541216230101 is a deficient number, since it is larger than the sum of its proper divisors (2150885594571).

221541216230101 is a wasteful number, since it uses less digits than its factorization.

221541216230101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150885594570.

The product of its (nonzero) digits is 5760, while the sum is 31.

Adding to 221541216230101 its reverse (101032612145122), we get a palindrome (322573828375223).

The spelling of 221541216230101 in words is "two hundred twenty-one trillion, five hundred forty-one billion, two hundred sixteen million, two hundred thirty thousand, one hundred one".