12031023331011 has 4 divisors (see below), whose sum is σ = 16041364441352. Its totient is φ = 8020682220672.

The previous prime is 12031023331009. The next prime is 12031023331057. The reversal of 12031023331011 is 11013332013021.

It is a happy number.

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

It is not a de Polignac number, because 12031023331011 - 2¹ = 12031023331009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12031023331511) 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, 2005170555166 + ... + 2005170555171.

It is an arithmetic number, because the mean of its divisors is an integer number (4010341110338).

Almost surely, 2^{12031023331011} is an apocalyptic number.

12031023331011 is a deficient number, since it is larger than the sum of its proper divisors (4010341110341).

12031023331011 is an equidigital number, since it uses as much as digits as its factorization.

12031023331011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010341110340.

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

Adding to 12031023331011 its reverse (11013332013021), we get a palindrome (23044355344032).

The spelling of 12031023331011 in words is "twelve trillion, thirty-one billion, twenty-three million, three hundred thirty-one thousand, eleven".