221039141 has 4 divisors (see below), whose sum is σ = 232672800. Its totient is φ = 209405484.

The previous prime is 221039123. The next prime is 221039197. The reversal of 221039141 is 141930122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 141930122 = 2 ⋅70965061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221039141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221039111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5816801 + ... + 5816838.

It is an arithmetic number, because the mean of its divisors is an integer number (58168200).

Almost surely, 2^221039141 is an apocalyptic number.

It is an amenable number.

221039141 is a deficient number, since it is larger than the sum of its proper divisors (11633659).

221039141 is a wasteful number, since it uses less digits than its factorization.

221039141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11633658.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 221039141 is about 14867.3851433263. The cubic root of 221039141 is about 604.6300504473.

Adding to 221039141 its reverse (141930122), we get a palindrome (362969263).

The spelling of 221039141 in words is "two hundred twenty-one million, thirty-nine thousand, one hundred forty-one".