11231223312311 has 6 divisors (see below), whose sum is σ = 11740768415880. Its totient is φ = 10742909254748.

The previous prime is 11231223312233. The next prime is 11231223312343. The reversal of 11231223312311 is 11321332213211.

It is a de Polignac number, because none of the positive numbers 2^k-11231223312311 is a prime.

It is a super-2 number, since 2×11231223312311² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231223332311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10615522451 + ... + 10615523508.

It is an arithmetic number, because the mean of its divisors is an integer number (1956794735980).

Almost surely, 2^{11231223312311} is an apocalyptic number.

11231223312311 is a deficient number, since it is larger than the sum of its proper divisors (509545103569).

11231223312311 is an equidigital number, since it uses as much as digits as its factorization.

11231223312311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21231046005 (or 21231045982 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

Adding to 11231223312311 its reverse (11321332213211), we get a palindrome (22552555525522).

The spelling of 11231223312311 in words is "eleven trillion, two hundred thirty-one billion, two hundred twenty-three million, three hundred twelve thousand, three hundred eleven".