10821312 has 42 divisors (see below), whose sum is σ = 31018988. Its totient is φ = 3606912.

The previous prime is 10821287. The next prime is 10821313. The reversal of 10821312 is 21312801.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (10821313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8818 + ... + 9969.

Almost surely, 2^10821312 is an apocalyptic number.

10821312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10821312 is an abundant number, since it is smaller than the sum of its proper divisors (20197676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10821312 is a wasteful number, since it uses less digits than its factorization.

10821312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18805 (or 18792 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 10821312 is about 3289.5762645058. The cubic root of 10821312 is about 221.1871908277.

The spelling of 10821312 in words is "ten million, eight hundred twenty-one thousand, three hundred twelve".