311242124420 has 96 divisors (see below), whose sum is σ = 723218969088. Its totient is φ = 112013217792.

The previous prime is 311242124419. The next prime is 311242124441. The reversal of 311242124420 is 24421242113.

It is a self number, because there is not a number n which added to its sum of digits gives 311242124420.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 460664 + ... + 913616.

It is an arithmetic number, because the mean of its divisors is an integer number (7533530928).

Almost surely, 2^311242124420 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 311242124420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361609484544).

311242124420 is an abundant number, since it is smaller than the sum of its proper divisors (411976844668).

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

311242124420 is a wasteful number, since it uses less digits than its factorization.

311242124420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453069 (or 453067 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 311242124420 its reverse (24421242113), we get a palindrome (335663366533).

The spelling of 311242124420 in words is "three hundred eleven billion, two hundred forty-two million, one hundred twenty-four thousand, four hundred twenty".