12031013013231 has 4 divisors (see below), whose sum is σ = 16041350684312. Its totient is φ = 8020675342152.

The previous prime is 12031013013133. The next prime is 12031013013247. The reversal of 12031013013231 is 13231031013021.

It is a happy number.

12031013013231 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.

It is not a de Polignac number, because 12031013013231 - 2³⁵ = 11996653274863 is a prime.

It is a super-2 number, since 2×12031013013231² (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 = 12031013013198 and 12031013013207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031013013031) 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, 2005168835536 + ... + 2005168835541.

It is an arithmetic number, because the mean of its divisors is an integer number (4010337671078).

Almost surely, 2^{12031013013231} is an apocalyptic number.

12031013013231 is a deficient number, since it is larger than the sum of its proper divisors (4010337671081).

12031013013231 is an equidigital number, since it uses as much as digits as its factorization.

12031013013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010337671080.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 12031013013231 its reverse (13231031013021), we get a palindrome (25262044026252).

The spelling of 12031013013231 in words is "twelve trillion, thirty-one billion, thirteen million, thirteen thousand, two hundred thirty-one".