221244431141 has 4 divisors (see below), whose sum is σ = 221250420384. Its totient is φ = 221238441900.

The previous prime is 221244431131. The next prime is 221244431143. The reversal of 221244431141 is 141134442122.

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 a cyclic number.

It is not a de Polignac number, because 221244431141 - 2¹⁰ = 221244430117 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 (221244431143) 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, 2938865 + ... + 3013206.

It is an arithmetic number, because the mean of its divisors is an integer number (55312605096).

Almost surely, 2^221244431141 is an apocalyptic number.

It is an amenable number.

221244431141 is a deficient number, since it is larger than the sum of its proper divisors (5989243).

221244431141 is an equidigital number, since it uses as much as digits as its factorization.

221244431141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5989242.

The product of its digits is 6144, while the sum is 29.

Adding to 221244431141 its reverse (141134442122), we get a palindrome (362378873263).

The spelling of 221244431141 in words is "two hundred twenty-one billion, two hundred forty-four million, four hundred thirty-one thousand, one hundred forty-one".