311220301112 has 128 divisors (see below), whose sum is σ = 767273472000. Its totient is φ = 115090606080.

The previous prime is 311220301079. The next prime is 311220301123. The reversal of 311220301112 is 211103022113.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

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, 283214 + ... + 838242.

It is an arithmetic number, because the mean of its divisors is an integer number (5994324000).

Almost surely, 2^311220301112 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 311220301112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383636736000).

311220301112 is an abundant number, since it is smaller than the sum of its proper divisors (456053170888).

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

311220301112 is a wasteful number, since it uses less digits than its factorization.

311220301112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555109 (or 555105 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 311220301112 its reverse (211103022113), we get a palindrome (522323323225).

The spelling of 311220301112 in words is "three hundred eleven billion, two hundred twenty million, three hundred one thousand, one hundred twelve".