12010003121 has 4 divisors (see below), whose sum is σ = 12048374052. Its totient is φ = 11971632192.

The previous prime is 12010003063. The next prime is 12010003133. The reversal of 12010003121 is 12130001021.

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 4774119025 + 7235884096 = 69095^2 + 85064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12010003121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12010003321) 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, 19184996 + ... + 19185621.

It is an arithmetic number, because the mean of its divisors is an integer number (3012093513).

Almost surely, 2^12010003121 is an apocalyptic number.

It is an amenable number.

12010003121 is a deficient number, since it is larger than the sum of its proper divisors (38370931).

12010003121 is an equidigital number, since it uses as much as digits as its factorization.

12010003121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38370930.

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

Adding to 12010003121 its reverse (12130001021), we get a palindrome (24140004142).

The spelling of 12010003121 in words is "twelve billion, ten million, three thousand, one hundred twenty-one".