11311234031 has 4 divisors (see below), whose sum is σ = 11313615600. Its totient is φ = 11308852464.

The previous prime is 11311233961. The next prime is 11311234043. The reversal of 11311234031 is 13043211311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13043211311 = 13 ⋅1003323947.

It is a cyclic number.

It is not a de Polignac number, because 11311234031 - 2³⁰ = 10237492207 is a prime.

It is a super-2 number, since 2×11311234031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11311233994 and 11311234012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311234091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183646 + ... + 1193163.

It is an arithmetic number, because the mean of its divisors is an integer number (2828403900).

Almost surely, 2^11311234031 is an apocalyptic number.

11311234031 is a deficient number, since it is larger than the sum of its proper divisors (2381569).

11311234031 is an equidigital number, since it uses as much as digits as its factorization.

11311234031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381568.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 11311234031 its reverse (13043211311), we get a palindrome (24354445342).

The spelling of 11311234031 in words is "eleven billion, three hundred eleven million, two hundred thirty-four thousand, thirty-one".