311121111101 has 4 divisors (see below), whose sum is σ = 311475868092. Its totient is φ = 310766354112.

The previous prime is 311121110987. The next prime is 311121111121. The reversal of 311121111101 is 101111121113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101111121113 = 463 ⋅218382551.

It can be written as a sum of positive squares in 2 ways, for example, as 123727359001 + 187393752100 = 351749^2 + 432890^2 .

It is a cyclic number.

It is not a de Polignac number, because 311121111101 - 2¹⁴ = 311121094717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311121111121) 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, 177377180 + ... + 177378933.

It is an arithmetic number, because the mean of its divisors is an integer number (77868967023).

Almost surely, 2^311121111101 is an apocalyptic number.

It is an amenable number.

311121111101 is a deficient number, since it is larger than the sum of its proper divisors (354756991).

311121111101 is an equidigital number, since it uses as much as digits as its factorization.

311121111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354756990.

The product of its (nonzero) digits is 6, while the sum is 14.

Adding to 311121111101 its reverse (101111121113), we get a palindrome (412232232214).

The spelling of 311121111101 in words is "three hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred one".