221351141441 has 4 divisors (see below), whose sum is σ = 224383348932. Its totient is φ = 218318933952.

The previous prime is 221351141383. The next prime is 221351141447. The reversal of 221351141441 is 144141153122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126981759025 + 94369382416 = 356345^2 + 307196^2 .

It is a cyclic number.

It is not a de Polignac number, because 221351141441 - 2⁶ = 221351141377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221351141447) 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, 1516103636 + ... + 1516103781.

It is an arithmetic number, because the mean of its divisors is an integer number (56095837233).

Almost surely, 2^221351141441 is an apocalyptic number.

It is an amenable number.

221351141441 is a deficient number, since it is larger than the sum of its proper divisors (3032207491).

221351141441 is an equidigital number, since it uses as much as digits as its factorization.

221351141441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032207490.

The product of its digits is 3840, while the sum is 29.

Adding to 221351141441 its reverse (144141153122), we get a palindrome (365492294563).

The spelling of 221351141441 in words is "two hundred twenty-one billion, three hundred fifty-one million, one hundred forty-one thousand, four hundred forty-one".