313351121020 has 96 divisors (see below), whose sum is σ = 759110188032. Its totient is φ = 106428307968.

The previous prime is 313351120939. The next prime is 313351121021. The reversal of 313351121020 is 20121153313.

It is a junction number, because it is equal to n+sod(n) for n = 313351120982 and 313351121000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313351121021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9323887 + ... + 9357433.

It is an arithmetic number, because the mean of its divisors is an integer number (7907397792).

Almost surely, 2^313351121020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 313351121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379555094016).

313351121020 is an abundant number, since it is smaller than the sum of its proper divisors (445759067012).

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

313351121020 is a wasteful number, since it uses less digits than its factorization.

313351121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34187 (or 34185 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 313351121020 its reverse (20121153313), we get a palindrome (333472274333).

The spelling of 313351121020 in words is "three hundred thirteen billion, three hundred fifty-one million, one hundred twenty-one thousand, twenty".