12013111031 has 4 divisors (see below), whose sum is σ = 12013357200. Its totient is φ = 12012864864.

The previous prime is 12013111027. The next prime is 12013111051. The reversal of 12013111031 is 13011131021.

It is a happy number.

12013111031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13011131021 = 7 ⋅1858733003.

It is a cyclic number.

It is not a de Polignac number, because 12013111031 - 2² = 12013111027 is a prime.

It is a super-2 number, since 2×12013111031² (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 = 12013110997 and 12013111015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013111051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22466 + ... + 156623.

It is an arithmetic number, because the mean of its divisors is an integer number (3003339300).

Almost surely, 2^12013111031 is an apocalyptic number.

12013111031 is a deficient number, since it is larger than the sum of its proper divisors (246169).

12013111031 is an equidigital number, since it uses as much as digits as its factorization.

12013111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246168.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 12013111031 its reverse (13011131021), we get a palindrome (25024242052).

The spelling of 12013111031 in words is "twelve billion, thirteen million, one hundred eleven thousand, thirty-one".