11131230312031 has 4 divisors (see below), whose sum is σ = 11717084539000. Its totient is φ = 10545376085064.

The previous prime is 11131230312011. The next prime is 11131230312047. The reversal of 11131230312031 is 13021303213111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11131230312031 is a prime.

It is a super-2 number, since 2×11131230312031² (a number of 27 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 = 11131230311993 and 11131230312011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131230312011) 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, 292927113456 + ... + 292927113493.

It is an arithmetic number, because the mean of its divisors is an integer number (2929271134750).

Almost surely, 2^{11131230312031} is an apocalyptic number.

11131230312031 is a deficient number, since it is larger than the sum of its proper divisors (585854226969).

11131230312031 is an equidigital number, since it uses as much as digits as its factorization.

11131230312031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585854226968.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 11131230312031 its reverse (13021303213111), we get a palindrome (24152533525142).

The spelling of 11131230312031 in words is "eleven trillion, one hundred thirty-one billion, two hundred thirty million, three hundred twelve thousand, thirty-one".