221330131241 has 2 divisors, whose sum is σ = 221330131242. Its totient is φ = 221330131240.

The previous prime is 221330131219. The next prime is 221330131273. The reversal of 221330131241 is 142131033122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150062489641 + 71267641600 = 387379^2 + 266960^2 .

It is a cyclic number.

It is not a de Polignac number, because 221330131241 - 2²⁶ = 221263022377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (221330131201) 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 as a sum of consecutive naturals, namely, 110665065620 + 110665065621.

It is an arithmetic number, because the mean of its divisors is an integer number (110665065621).

Almost surely, 2^221330131241 is an apocalyptic number.

It is an amenable number.

221330131241 is a deficient number, since it is larger than the sum of its proper divisors (1).

221330131241 is an equidigital number, since it uses as much as digits as its factorization.

221330131241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 221330131241 its reverse (142131033122), we get a palindrome (363461164363).

The spelling of 221330131241 in words is "two hundred twenty-one billion, three hundred thirty million, one hundred thirty-one thousand, two hundred forty-one".