313121133220 has 48 divisors (see below), whose sum is σ = 759934465920. Its totient is φ = 106149567744.

The previous prime is 313121133211. The next prime is 313121133233. The reversal of 313121133220 is 22331121313.

It is a junction number, because it is equal to n+sod(n) for n = 313121133191 and 313121133200.

It is an unprimeable number.

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, 12552594 + ... + 12577513.

It is an arithmetic number, because the mean of its divisors is an integer number (15831968040).

Almost surely, 2^313121133220 is an apocalyptic number.

It is an amenable number.

313121133220 is an abundant number, since it is smaller than the sum of its proper divisors (446813332700).

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

313121133220 is a wasteful number, since it uses less digits than its factorization.

313121133220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25130212 (or 25130210 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 313121133220 its reverse (22331121313), we get a palindrome (335452254533).

The spelling of 313121133220 in words is "three hundred thirteen billion, one hundred twenty-one million, one hundred thirty-three thousand, two hundred twenty".