312103221 has 8 divisors (see below), whose sum is σ = 440616384. Its totient is φ = 195829440.

The previous prime is 312103217. The next prime is 312103229. The reversal of 312103221 is 122301213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312103221 - 2² = 312103217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312103221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312103229) 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 7 ways as a sum of consecutive naturals, for example, 3059785 + ... + 3059886.

It is an arithmetic number, because the mean of its divisors is an integer number (55077048).

Almost surely, 2^312103221 is an apocalyptic number.

It is an amenable number.

312103221 is a deficient number, since it is larger than the sum of its proper divisors (128513163).

312103221 is a wasteful number, since it uses less digits than its factorization.

312103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6119691.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 312103221 is about 17666.4433602239. The cubic root of 312103221 is about 678.3170761330.

Adding to 312103221 its reverse (122301213), we get a palindrome (434404434).

The spelling of 312103221 in words is "three hundred twelve million, one hundred three thousand, two hundred twenty-one".