11231311211 has 2 divisors, whose sum is σ = 11231311212. Its totient is φ = 11231311210.

The previous prime is 11231311159. The next prime is 11231311229. The reversal of 11231311211 is 11211313211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11231311211 - 2¹⁴ = 11231294827 is a prime.

It is a super-2 number, since 2×11231311211² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11231311211.

It is not a weakly prime, because it can be changed into another prime (11231311241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5615655605 + 5615655606.

It is an arithmetic number, because the mean of its divisors is an integer number (5615655606).

Almost surely, 2^11231311211 is an apocalyptic number.

11231311211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11231311211 is an equidigital number, since it uses as much as digits as its factorization.

11231311211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 17.

Adding to 11231311211 its reverse (11211313211), we get a palindrome (22442624422).

The spelling of 11231311211 in words is "eleven billion, two hundred thirty-one million, three hundred eleven thousand, two hundred eleven".