311302122011 has 4 divisors (see below), whose sum is σ = 311968722312. Its totient is φ = 310635521712.

The previous prime is 311302121981. The next prime is 311302122017. The reversal of 311302122011 is 110221203113.

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

It is a cyclic number.

It is not a de Polignac number, because 311302122011 - 2²⁶ = 311235013147 is a prime.

It is a super-2 number, since 2×311302122011² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311302122017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333299450 + ... + 333300383.

It is an arithmetic number, because the mean of its divisors is an integer number (77992180578).

Almost surely, 2^311302122011 is an apocalyptic number.

311302122011 is a deficient number, since it is larger than the sum of its proper divisors (666600301).

311302122011 is an equidigital number, since it uses as much as digits as its factorization.

311302122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666600300.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 311302122011 its reverse (110221203113), we get a palindrome (421523325124).

The spelling of 311302122011 in words is "three hundred eleven billion, three hundred two million, one hundred twenty-two thousand, eleven".