312010221 has 4 divisors (see below), whose sum is σ = 416013632. Its totient is φ = 208006812.

The previous prime is 312010207. The next prime is 312010241. The reversal of 312010221 is 122010213.

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 not a de Polignac number, because 312010221 - 2¹⁴ = 311993837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312010197 and 312010206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312010201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52001701 + ... + 52001706.

It is an arithmetic number, because the mean of its divisors is an integer number (104003408).

Almost surely, 2^312010221 is an apocalyptic number.

It is an amenable number.

312010221 is a deficient number, since it is larger than the sum of its proper divisors (104003411).

312010221 is a wasteful number, since it uses less digits than its factorization.

312010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104003410.

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

The square root of 312010221 is about 17663.8110553753. The cubic root of 312010221 is about 678.2496948408.

Adding to 312010221 its reverse (122010213), we get a palindrome (434020434).

The spelling of 312010221 in words is "three hundred twelve million, ten thousand, two hundred twenty-one".