11331123031 has 2 divisors, whose sum is σ = 11331123032. Its totient is φ = 11331123030.

The previous prime is 11331123017. The next prime is 11331123071. The reversal of 11331123031 is 13032113311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11331123031 - 2⁹ = 11331122519 is a prime.

It is a super-2 number, since 2×11331123031² (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 (11331123071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665561515 + 5665561516.

It is an arithmetic number, because the mean of its divisors is an integer number (5665561516).

Almost surely, 2^11331123031 is an apocalyptic number.

11331123031 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331123031 is an equidigital number, since it uses as much as digits as its factorization.

11331123031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 11331123031 its reverse (13032113311), we get a palindrome (24363236342).

The spelling of 11331123031 in words is "eleven billion, three hundred thirty-one million, one hundred twenty-three thousand, thirty-one".