313120221 has 8 divisors (see below), whose sum is σ = 431890080. Its totient is φ = 201548592.

The previous prime is 313120219. The next prime is 313120277. The reversal of 313120221 is 122021313.

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

It is not a de Polignac number, because 313120221 - 2¹ = 313120219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 313120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313120201) 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 7 ways as a sum of consecutive naturals, for example, 1799455 + ... + 1799628.

It is an arithmetic number, because the mean of its divisors is an integer number (53986260).

Almost surely, 2^313120221 is an apocalyptic number.

It is an amenable number.

313120221 is a deficient number, since it is larger than the sum of its proper divisors (118769859).

313120221 is a wasteful number, since it uses less digits than its factorization.

313120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3599115.

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

The square root of 313120221 is about 17695.2033331070. The cubic root of 313120221 is about 679.0530511508.

Adding to 313120221 its reverse (122021313), we get a palindrome (435141534).

The spelling of 313120221 in words is "three hundred thirteen million, one hundred twenty thousand, two hundred twenty-one".