10312221 has 4 divisors (see below), whose sum is σ = 13749632. Its totient is φ = 6874812.

The previous prime is 10312213. The next prime is 10312229. The reversal of 10312221 is 12221301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (10312213) and next prime (10312229).

It is not a de Polignac number, because 10312221 - 2³ = 10312213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10312197 and 10312206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10312229) 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, 1718701 + ... + 1718706.

It is an arithmetic number, because the mean of its divisors is an integer number (3437408).

Almost surely, 2^10312221 is an apocalyptic number.

It is an amenable number.

10312221 is a deficient number, since it is larger than the sum of its proper divisors (3437411).

10312221 is an equidigital number, since it uses as much as digits as its factorization.

10312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3437410.

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

The square root of 10312221 is about 3211.2647041314. The cubic root of 10312221 is about 217.6627293219.

Adding to 10312221 its reverse (12221301), we get a palindrome (22533522).

The spelling of 10312221 in words is "ten million, three hundred twelve thousand, two hundred twenty-one".