10821115 has 4 divisors (see below), whose sum is σ = 12985344. Its totient is φ = 8656888.

The previous prime is 10821101. The next prime is 10821121. The reversal of 10821115 is 51112801.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10821115 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10821092 and 10821101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082107 + ... + 1082116.

It is an arithmetic number, because the mean of its divisors is an integer number (3246336).

Almost surely, 2^10821115 is an apocalyptic number.

10821115 is a deficient number, since it is larger than the sum of its proper divisors (2164229).

10821115 is an equidigital number, since it uses as much as digits as its factorization.

10821115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164228.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 10821115 is about 3289.5463213033. The cubic root of 10821115 is about 221.1858485955.

Adding to 10821115 its reverse (51112801), we get a palindrome (61933916).

It can be divided in two parts, 1082 and 1115, that added together give a cube (2197 = 13³).

The spelling of 10821115 in words is "ten million, eight hundred twenty-one thousand, one hundred fifteen".