11331323231 has 2 divisors, whose sum is σ = 11331323232. Its totient is φ = 11331323230.

The previous prime is 11331323161. The next prime is 11331323243. The reversal of 11331323231 is 13232313311.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11331323231 is a prime.

It is a super-2 number, since 2×11331323231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11331323197 and 11331323206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11331323251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665661615 + 5665661616.

It is an arithmetic number, because the mean of its divisors is an integer number (5665661616).

Almost surely, 2^11331323231 is an apocalyptic number.

11331323231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331323231 is an equidigital number, since it uses as much as digits as its factorization.

11331323231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 23.

Adding to 11331323231 its reverse (13232313311), we get a palindrome (24563636542).

The spelling of 11331323231 in words is "eleven billion, three hundred thirty-one million, three hundred twenty-three thousand, two hundred thirty-one".