311231011101011 has 2 divisors, whose sum is σ = 311231011101012. Its totient is φ = 311231011101010.

The previous prime is 311231011100993. The next prime is 311231011101047. The reversal of 311231011101011 is 110101110132113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311231011101011 - 2²² = 311231006906707 is a prime.

It is not a weakly prime, because it can be changed into another prime (311231011101061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155615505550505 + 155615505550506.

It is an arithmetic number, because the mean of its divisors is an integer number (155615505550506).

Almost surely, 2^{311231011101011} is an apocalyptic number.

311231011101011 is a deficient number, since it is larger than the sum of its proper divisors (1).

311231011101011 is an equidigital number, since it uses as much as digits as its factorization.

311231011101011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 311231011101011 its reverse (110101110132113), we get a palindrome (421332121233124).

The spelling of 311231011101011 in words is "three hundred eleven trillion, two hundred thirty-one billion, eleven million, one hundred one thousand, eleven".