10821299 has 4 divisors (see below), whose sum is σ = 11457864. Its totient is φ = 10184736.

The previous prime is 10821287. The next prime is 10821313. The reversal of 10821299 is 99212801.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 10821299 - 2⁸ = 10821043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10821229) 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 in 3 ways as a sum of consecutive naturals, for example, 318257 + ... + 318290.

It is an arithmetic number, because the mean of its divisors is an integer number (2864466).

Almost surely, 2^10821299 is an apocalyptic number.

10821299 is a deficient number, since it is larger than the sum of its proper divisors (636565).

10821299 is an equidigital number, since it uses as much as digits as its factorization.

10821299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636564.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 10821299 is about 3289.5742885668. The cubic root of 10821299 is about 221.1871022545.

The spelling of 10821299 in words is "ten million, eight hundred twenty-one thousand, two hundred ninety-nine".