11310121231 has 2 divisors, whose sum is σ = 11310121232. Its totient is φ = 11310121230.

The previous prime is 11310121213. The next prime is 11310121247. The reversal of 11310121231 is 13212101311.

It is a happy number.

Together with previous prime (11310121213) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (11310121247) can be obtained adding 11310121231 to its sum of digits (16).

It is a strong prime.

It is an emirp because it is prime and its reverse (13212101311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11310121231 - 2¹⁵ = 11310088463 is a prime.

It is a super-2 number, since 2×11310121231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11310121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655060615 + 5655060616.

It is an arithmetic number, because the mean of its divisors is an integer number (5655060616).

Almost surely, 2^11310121231 is an apocalyptic number.

11310121231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11310121231 is an equidigital number, since it uses as much as digits as its factorization.

11310121231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11310121231 its reverse (13212101311), we get a palindrome (24522222542).

The spelling of 11310121231 in words is "eleven billion, three hundred ten million, one hundred twenty-one thousand, two hundred thirty-one".