313201021 has 4 divisors (see below), whose sum is σ = 357944032. Its totient is φ = 268458012.

The previous prime is 313201019. The next prime is 313201033. The reversal of 313201021 is 120102313.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120102313 = 269 ⋅446477.

It is a cyclic number.

It is not a de Polignac number, because 313201021 - 2¹ = 313201019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313200992 and 313201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313201621) 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, 22371495 + ... + 22371508.

It is an arithmetic number, because the mean of its divisors is an integer number (89486008).

Almost surely, 2^313201021 is an apocalyptic number.

It is an amenable number.

313201021 is a deficient number, since it is larger than the sum of its proper divisors (44743011).

313201021 is an equidigital number, since it uses as much as digits as its factorization.

313201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44743010.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 313201021 is about 17697.4862904312. The cubic root of 313201021 is about 679.1114555208. Note that the first 3 decimals are identical.

Adding to 313201021 its reverse (120102313), we get a palindrome (433303334).

The spelling of 313201021 in words is "three hundred thirteen million, two hundred one thousand, twenty-one".