10821361 has 2 divisors, whose sum is σ = 10821362. Its totient is φ = 10821360.

The previous prime is 10821359. The next prime is 10821373. The reversal of 10821361 is 16312801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 323761 = 3240^2 + 569^2 .

It is a cyclic number.

It is not a de Polignac number, because 10821361 - 2¹ = 10821359 is a prime.

Together with 10821359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10821331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5410680 + 5410681.

It is an arithmetic number, because the mean of its divisors is an integer number (5410681).

Almost surely, 2^10821361 is an apocalyptic number.

It is an amenable number.

10821361 is a deficient number, since it is larger than the sum of its proper divisors (1).

10821361 is an equidigital number, since it uses as much as digits as its factorization.

10821361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 10821361 is about 3289.5837122651. The cubic root of 10821361 is about 221.1875246799.

The spelling of 10821361 in words is "ten million, eight hundred twenty-one thousand, three hundred sixty-one".