10221312 has 36 divisors (see below), whose sum is σ = 27205640. Its totient is φ = 3406848.

The previous prime is 10221293. The next prime is 10221347. The reversal of 10221312 is 21312201.

10221312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 5887 + ... + 7422.

Almost surely, 2^10221312 is an apocalyptic number.

10221312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10221312 is an abundant number, since it is smaller than the sum of its proper divisors (16984328).

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

10221312 is an equidigital number, since it uses as much as digits as its factorization.

10221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13328 (or 13314 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 10221312 is about 3197.0786665329. The cubic root of 10221312 is about 217.0212272268.

Adding to 10221312 its reverse (21312201), we get a palindrome (31533513).

The spelling of 10221312 in words is "ten million, two hundred twenty-one thousand, three hundred twelve".