313020121213 has 4 divisors (see below), whose sum is σ = 319680123840. Its totient is φ = 306360118588.

The previous prime is 313020121189. The next prime is 313020121241. The reversal of 313020121213 is 312121020313.

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: 312121020313 = 223 ⋅1399645831.

It is a cyclic number.

It is not a de Polignac number, because 313020121213 - 2⁵ = 313020121181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313020121283) 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, 3330001243 + ... + 3330001336.

It is an arithmetic number, because the mean of its divisors is an integer number (79920030960).

Almost surely, 2^313020121213 is an apocalyptic number.

It is an amenable number.

313020121213 is a deficient number, since it is larger than the sum of its proper divisors (6660002627).

313020121213 is an equidigital number, since it uses as much as digits as its factorization.

313020121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6660002626.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 313020121213 its reverse (312121020313), we get a palindrome (625141141526).

The spelling of 313020121213 in words is "three hundred thirteen billion, twenty million, one hundred twenty-one thousand, two hundred thirteen".