311312011 has 4 divisors (see below), whose sum is σ = 311385592. Its totient is φ = 311238432.

The previous prime is 311311981. The next prime is 311312039. The reversal of 311312011 is 110213113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110213113 = 311 ⋅354383.

It is a cyclic number.

It is not a de Polignac number, because 311312011 - 2¹¹ = 311309963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311311982 and 311312000.

It is not an unprimeable number, because it can be changed into a prime (311312051) 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, 30030 + ... + 39043.

It is an arithmetic number, because the mean of its divisors is an integer number (77846398).

Almost surely, 2^311312011 is an apocalyptic number.

311312011 is a deficient number, since it is larger than the sum of its proper divisors (73581).

311312011 is an equidigital number, since it uses as much as digits as its factorization.

311312011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73580.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 311312011 is about 17644.0361312258. The cubic root of 311312011 is about 677.7433926229.

Adding to 311312011 its reverse (110213113), we get a palindrome (421525124).

The spelling of 311312011 in words is "three hundred eleven million, three hundred twelve thousand, eleven".