221211341 has 4 divisors (see below), whose sum is σ = 238227612. Its totient is φ = 204195072.

The previous prime is 221211269. The next prime is 221211379. The reversal of 221211341 is 143112122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 143112122 = 2 ⋅71556061.

It can be written as a sum of positive squares in 2 ways, for example, as 41088100 + 180123241 = 6410^2 + 13421^2 .

It is a cyclic number.

It is not a de Polignac number, because 221211341 - 2²² = 217017037 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 (221211541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8508116 + ... + 8508141.

It is an arithmetic number, because the mean of its divisors is an integer number (59556903).

Almost surely, 2^221211341 is an apocalyptic number.

It is an amenable number.

221211341 is a deficient number, since it is larger than the sum of its proper divisors (17016271).

221211341 is a wasteful number, since it uses less digits than its factorization.

221211341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17016270.

The product of its digits is 96, while the sum is 17.

The square root of 221211341 is about 14873.1752158038. The cubic root of 221211341 is about 604.7870215437.

Adding to 221211341 its reverse (143112122), we get a palindrome (364323463).

The spelling of 221211341 in words is "two hundred twenty-one million, two hundred eleven thousand, three hundred forty-one".