221124441 has 4 divisors (see below), whose sum is σ = 294832592. Its totient is φ = 147416292.

The previous prime is 221124437. The next prime is 221124481. The reversal of 221124441 is 144421122.

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.

It is not a de Polignac number, because 221124441 - 2² = 221124437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221124481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36854071 + ... + 36854076.

It is an arithmetic number, because the mean of its divisors is an integer number (73708148).

Almost surely, 2^221124441 is an apocalyptic number.

It is an amenable number.

221124441 is a deficient number, since it is larger than the sum of its proper divisors (73708151).

221124441 is an equidigital number, since it uses as much as digits as its factorization.

221124441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73708150.

The product of its digits is 512, while the sum is 21.

The square root of 221124441 is about 14870.2535620614. The cubic root of 221124441 is about 604.7078169312.

Adding to 221124441 its reverse (144421122), we get a palindrome (365545563).

The spelling of 221124441 in words is "two hundred twenty-one million, one hundred twenty-four thousand, four hundred forty-one".