311321011 has 2 divisors, whose sum is σ = 311321012. Its totient is φ = 311321010.

The previous prime is 311320991. The next prime is 311321027. The reversal of 311321011 is 110123113.

It is a strong prime.

It is an emirp because it is prime and its reverse (110123113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311321011 - 2¹¹ = 311318963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311320982 and 311321000.

It is not a weakly prime, because it can be changed into another prime (311321411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155660505 + 155660506.

It is an arithmetic number, because the mean of its divisors is an integer number (155660506).

Almost surely, 2^311321011 is an apocalyptic number.

311321011 is a deficient number, since it is larger than the sum of its proper divisors (1).

311321011 is an equidigital number, since it uses as much as digits as its factorization.

311321011 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 13.

The square root of 311321011 is about 17644.2911730678. The cubic root of 311321011 is about 677.7499237252.

Adding to 311321011 its reverse (110123113), we get a palindrome (421444124).

The spelling of 311321011 in words is "three hundred eleven million, three hundred twenty-one thousand, eleven".