221324172105 has 16 divisors (see below), whose sum is σ = 354158190144. Its totient is φ = 118026386880.

The previous prime is 221324172073. The next prime is 221324172127. The reversal of 221324172105 is 501271423122.

It is not a de Polignac number, because 221324172105 - 2⁵ = 221324172073 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 683554 + ... + 953883.

It is an arithmetic number, because the mean of its divisors is an integer number (22134886884).

Almost surely, 2^221324172105 is an apocalyptic number.

It is an amenable number.

221324172105 is a deficient number, since it is larger than the sum of its proper divisors (132834018039).

221324172105 is a wasteful number, since it uses less digits than its factorization.

221324172105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646456.

The product of its (nonzero) digits is 6720, while the sum is 30.

Adding to 221324172105 its reverse (501271423122), we get a palindrome (722595595227).

The spelling of 221324172105 in words is "two hundred twenty-one billion, three hundred twenty-four million, one hundred seventy-two thousand, one hundred five".