12036003121 has 4 divisors (see below), whose sum is σ = 12036486132. Its totient is φ = 12035520112.

The previous prime is 12036003113. The next prime is 12036003181. The reversal of 12036003121 is 12130063021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12130063021 = 4441 ⋅2731381.

It can be written as a sum of positive squares in 2 ways, for example, as 4368549025 + 7667454096 = 66095^2 + 87564^2 .

It is a cyclic number.

It is not a de Polignac number, because 12036003121 - 2³ = 12036003113 is a prime.

It is a super-2 number, since 2×12036003121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12036003181) 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, 201970 + ... + 254683.

It is an arithmetic number, because the mean of its divisors is an integer number (3009121533).

Almost surely, 2^12036003121 is an apocalyptic number.

It is an amenable number.

12036003121 is a deficient number, since it is larger than the sum of its proper divisors (483011).

12036003121 is an equidigital number, since it uses as much as digits as its factorization.

12036003121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483010.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12036003121 its reverse (12130063021), we get a palindrome (24166066142).

The spelling of 12036003121 in words is "twelve billion, thirty-six million, three thousand, one hundred twenty-one".