21000332341 has 2 divisors, whose sum is σ = 21000332342. Its totient is φ = 21000332340.

The previous prime is 21000332333. The next prime is 21000332347. The reversal of 21000332341 is 14323300012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17173054116 + 3827278225 = 131046^2 + 61865^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000332341 - 2³ = 21000332333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000332347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500166170 + 10500166171.

It is an arithmetic number, because the mean of its divisors is an integer number (10500166171).

Almost surely, 2^21000332341 is an apocalyptic number.

It is an amenable number.

21000332341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000332341 is an equidigital number, since it uses as much as digits as its factorization.

21000332341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21000332341 its reverse (14323300012), we get a palindrome (35323632353).

The spelling of 21000332341 in words is "twenty-one billion, three hundred thirty-two thousand, three hundred forty-one".