311112102005 has 4 divisors (see below), whose sum is σ = 373334522412. Its totient is φ = 248889681600.

The previous prime is 311112101957. The next prime is 311112102031. The reversal of 311112102005 is 500201211113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500201211113 = 557 ⋅898027309.

It can be written as a sum of positive squares in 2 ways, for example, as 106483437124 + 204628664881 = 326318^2 + 452359^2 .

It is not a de Polignac number, because 311112102005 - 2¹⁴ = 311112085621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31111210196 + ... + 31111210205.

It is an arithmetic number, because the mean of its divisors is an integer number (93333630603).

Almost surely, 2^311112102005 is an apocalyptic number.

It is an amenable number.

311112102005 is a deficient number, since it is larger than the sum of its proper divisors (62222420407).

311112102005 is an equidigital number, since it uses as much as digits as its factorization.

311112102005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62222420406.

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 311112102005 its reverse (500201211113), we get a palindrome (811313313118).

The spelling of 311112102005 in words is "three hundred eleven billion, one hundred twelve million, one hundred two thousand, five".