312221001 has 8 divisors (see below), whose sum is σ = 416826784. Its totient is φ = 207881280.

The previous prime is 312220969. The next prime is 312221003. The reversal of 312221001 is 100122213.

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

It is not a de Polignac number, because 312221001 - 2⁵ = 312220969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312221003) 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, 63760 + ... + 68481.

It is an arithmetic number, because the mean of its divisors is an integer number (52103348).

Almost surely, 2^312221001 is an apocalyptic number.

It is an amenable number.

312221001 is a deficient number, since it is larger than the sum of its proper divisors (104605783).

312221001 is a wasteful number, since it uses less digits than its factorization.

312221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133031.

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

The square root of 312221001 is about 17669.7764841551. The cubic root of 312221001 is about 678.4023920714.

Adding to 312221001 its reverse (100122213), we get a palindrome (412343214).

It can be divided in two parts, 31222 and 1001, that added together give a palindrome (32223).

The spelling of 312221001 in words is "three hundred twelve million, two hundred twenty-one thousand, one".