12031321323121 has 16 divisors (see below), whose sum is σ = 13443994137600. Its totient is φ = 10700040238848.

The previous prime is 12031321323071. The next prime is 12031321323157. The reversal of 12031321323121 is 12132312313021.

It is a cyclic number.

It is not a de Polignac number, because 12031321323121 - 2¹¹ = 12031321321073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12031321323191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47751825 + ... + 48003118.

It is an arithmetic number, because the mean of its divisors is an integer number (840249633600).

Almost surely, 2^{12031321323121} is an apocalyptic number.

It is an amenable number.

12031321323121 is a deficient number, since it is larger than the sum of its proper divisors (1412672814479).

12031321323121 is a wasteful number, since it uses less digits than its factorization.

12031321323121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95755368.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 12031321323121 its reverse (12132312313021), we get a palindrome (24163633636142).

The spelling of 12031321323121 in words is "twelve trillion, thirty-one billion, three hundred twenty-one million, three hundred twenty-three thousand, one hundred twenty-one".