201311322111 has 8 divisors (see below), whose sum is σ = 298238995760. Its totient is φ = 134207548056.

The previous prime is 201311322073. The next prime is 201311322131. The reversal of 201311322111 is 111223113102.

201311322111 is a `hidden beast` number, since 20 + 1 + 311 + 322 + 1 + 11 = 666.

It is not a de Polignac number, because 201311322111 - 2²¹ = 201309224959 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 (201311322131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3727987420 + ... + 3727987473.

It is an arithmetic number, because the mean of its divisors is an integer number (37279874470).

Almost surely, 2^201311322111 is an apocalyptic number.

201311322111 is a deficient number, since it is larger than the sum of its proper divisors (96927673649).

201311322111 is an equidigital number, since it uses as much as digits as its factorization.

201311322111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7455974902 (or 7455974896 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 201311322111 its reverse (111223113102), we get a palindrome (312534435213).

The spelling of 201311322111 in words is "two hundred one billion, three hundred eleven million, three hundred twenty-two thousand, one hundred eleven".