12000013121 has 4 divisors (see below), whose sum is σ = 12017132244. Its totient is φ = 11982894000.

The previous prime is 12000013097. The next prime is 12000013171. The reversal of 12000013121 is 12131000021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9012844096 + 2987169025 = 94936^2 + 54655^2 .

It is not a de Polignac number, because 12000013121 - 2¹⁸ = 11999750977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12000013171) 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, 8558510 + ... + 8559911.

It is an arithmetic number, because the mean of its divisors is an integer number (3004283061).

Almost surely, 2^12000013121 is an apocalyptic number.

It is an amenable number.

12000013121 is a deficient number, since it is larger than the sum of its proper divisors (17119123).

12000013121 is an equidigital number, since it uses as much as digits as its factorization.

12000013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17119122.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 12000013121 its reverse (12131000021), we get a palindrome (24131013142).

The spelling of 12000013121 in words is "twelve billion, thirteen thousand, one hundred twenty-one".