21144132241 has 2 divisors, whose sum is σ = 21144132242. Its totient is φ = 21144132240.

The previous prime is 21144132179. The next prime is 21144132253. The reversal of 21144132241 is 14223144112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21142323216 + 1809025 = 145404^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 21144132241 - 2¹³ = 21144124049 is a prime.

It is not a weakly prime, because it can be changed into another prime (21144132641) 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, 10572066120 + 10572066121.

It is an arithmetic number, because the mean of its divisors is an integer number (10572066121).

Almost surely, 2^21144132241 is an apocalyptic number.

It is an amenable number.

21144132241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21144132241 is an equidigital number, since it uses as much as digits as its factorization.

21144132241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 25.

Adding to 21144132241 its reverse (14223144112), we get a palindrome (35367276353).

The spelling of 21144132241 in words is "twenty-one billion, one hundred forty-four million, one hundred thirty-two thousand, two hundred forty-one".