312421211 has 4 divisors (see below), whose sum is σ = 312520392. Its totient is φ = 312322032.

The previous prime is 312421177. The next prime is 312421231. The reversal of 312421211 is 112124213.

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

It is a cyclic number.

It is not a de Polignac number, because 312421211 - 2²² = 308226907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312421211.

It is not an unprimeable number, because it can be changed into a prime (312421231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44705 + ... + 51218.

It is an arithmetic number, because the mean of its divisors is an integer number (78130098).

Almost surely, 2^312421211 is an apocalyptic number.

312421211 is a deficient number, since it is larger than the sum of its proper divisors (99181).

312421211 is an equidigital number, since it uses as much as digits as its factorization.

312421211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99180.

The product of its digits is 96, while the sum is 17.

The square root of 312421211 is about 17675.4408997343. The cubic root of 312421211 is about 678.5473683552.

Adding to 312421211 its reverse (112124213), we get a palindrome (424545424).

It can be divided in two parts, 31 and 2421211, that added together give a palindrome (2421242).

The spelling of 312421211 in words is "three hundred twelve million, four hundred twenty-one thousand, two hundred eleven".