221541216230066 has 16 divisors (see below), whose sum is σ = 332542477814400. Its totient is φ = 110693729077968.

The previous prime is 221541216230063. The next prime is 221541216230119. The reversal of 221541216230066 is 660032612145122.

It is not an unprimeable number, because it can be changed into a prime (221541216230063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80768180 + ... + 83466048.

It is an arithmetic number, because the mean of its divisors is an integer number (20783904863400).

Almost surely, 2^{221541216230066} is an apocalyptic number.

221541216230066 is a deficient number, since it is larger than the sum of its proper divisors (111001261584334).

221541216230066 is a wasteful number, since it uses less digits than its factorization.

221541216230066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726353.

The product of its (nonzero) digits is 207360, while the sum is 41.

Adding to 221541216230066 its reverse (660032612145122), we get a palindrome (881573828375188).

The spelling of 221541216230066 in words is "two hundred twenty-one trillion, five hundred forty-one billion, two hundred sixteen million, two hundred thirty thousand, sixty-six".