221144310321 has 32 divisors (see below), whose sum is σ = 327899612160. Its totient is φ = 131431435200.

The previous prime is 221144310307. The next prime is 221144310329. The reversal of 221144310321 is 123013441122.

It is not a de Polignac number, because 221144310321 - 2⁷ = 221144310193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221144310291 and 221144310300.

It is not an unprimeable number, because it can be changed into a prime (221144310329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3535206 + ... + 3597216.

It is an arithmetic number, because the mean of its divisors is an integer number (10246862880).

Almost surely, 2^221144310321 is an apocalyptic number.

It is an amenable number.

221144310321 is a deficient number, since it is larger than the sum of its proper divisors (106755301839).

221144310321 is a wasteful number, since it uses less digits than its factorization.

221144310321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64117.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 221144310321 its reverse (123013441122), we get a palindrome (344157751443).

The spelling of 221144310321 in words is "two hundred twenty-one billion, one hundred forty-four million, three hundred ten thousand, three hundred twenty-one".