313121022220 has 48 divisors (see below), whose sum is σ = 701716055040. Its totient is φ = 116952643584.

The previous prime is 313121022217. The next prime is 313121022229. The reversal of 313121022220 is 22220121313.

It is not an unprimeable number, because it can be changed into a prime (313121022229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3582585 + ... + 3668944.

It is an arithmetic number, because the mean of its divisors is an integer number (14619084480).

Almost surely, 2^313121022220 is an apocalyptic number.

It is an amenable number.

313121022220 is an abundant number, since it is smaller than the sum of its proper divisors (388595032820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

313121022220 is a wasteful number, since it uses less digits than its factorization.

313121022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7251682 (or 7251680 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 313121022220 its reverse (22220121313), we get a palindrome (335341143533).

The spelling of 313121022220 in words is "three hundred thirteen billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty".