311200100111 has 4 divisors (see below), whose sum is σ = 311355780000. Its totient is φ = 311044420224.

The previous prime is 311200100093. The next prime is 311200100119. The reversal of 311200100111 is 111001002113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311200100111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311200100092 and 311200100101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311200100119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77836946 + ... + 77840943.

It is an arithmetic number, because the mean of its divisors is an integer number (77838945000).

Almost surely, 2^311200100111 is an apocalyptic number.

311200100111 is a deficient number, since it is larger than the sum of its proper divisors (155679889).

311200100111 is a wasteful number, since it uses less digits than its factorization.

311200100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155679888.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 311200100111 its reverse (111001002113), we get a palindrome (422201102224).

The spelling of 311200100111 in words is "three hundred eleven billion, two hundred million, one hundred thousand, one hundred eleven".