311302122312 has 32 divisors (see below), whose sum is σ = 779749109280.
Its totient is φ = 103568200320.
The previous prime is 311302122281. The next prime is 311302122319. The reversal of 311302122312 is 213221203113.
Adding to 311302122312 its reverse (213221203113), we get a palindrome (524523325425).
It is a super-2 number, since 2×3113021223122 (a number of 24 digits) contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (311302122319) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12435598 + ... + 12460605.
It is an arithmetic number, because the mean of its divisors is an integer number (24367159665).
Almost surely, 2311302122312 is an apocalyptic number.
It is an amenable number.
311302122312 is an abundant number, since it is smaller than the sum of its proper divisors (468446986968).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
311302122312 is a wasteful number, since it uses less digits than its factorization.
311302122312 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 24896733 (or 24896729 counting only the distinct ones).
The product of its (nonzero) digits is 432, while the sum is 21.
The spelling of 311302122312 in words is "three hundred eleven billion, three hundred two million, one hundred twenty-two thousand, three hundred twelve".