311212223130 has 64 divisors (see below), whose sum is σ = 774425836800. Its totient is φ = 79945582080.

The previous prime is 311212223117. The next prime is 311212223177. The reversal of 311212223130 is 31322212113.

It is a junction number, because it is equal to n+sod(n) for n = 311212223097 and 311212223106.

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 31 ways as a sum of consecutive naturals, for example, 25491 + ... + 789350.

It is an arithmetic number, because the mean of its divisors is an integer number (12100403700).

Almost surely, 2^311212223130 is an apocalyptic number.

311212223130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 311212223130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387212918400).

311212223130 is an abundant number, since it is smaller than the sum of its proper divisors (463213613670).

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

311212223130 is a wasteful number, since it uses less digits than its factorization.

311212223130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815319.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 311212223130 its reverse (31322212113), we get a palindrome (342534435243).

The spelling of 311212223130 in words is "three hundred eleven billion, two hundred twelve million, two hundred twenty-three thousand, one hundred thirty".