12012400203 has 4 divisors (see below), whose sum is σ = 16016533608. Its totient is φ = 8008266800.

The previous prime is 12012400193. The next prime is 12012400207. The reversal of 12012400203 is 30200421021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30200421021 = 3 ⋅10066807007.

It is a cyclic number.

It is not a de Polignac number, because 12012400203 - 2⁶ = 12012400139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12012400207) 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, 2002066698 + ... + 2002066703.

It is an arithmetic number, because the mean of its divisors is an integer number (4004133402).

Almost surely, 2^12012400203 is an apocalyptic number.

12012400203 is a deficient number, since it is larger than the sum of its proper divisors (4004133405).

12012400203 is an equidigital number, since it uses as much as digits as its factorization.

12012400203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004133404.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 12012400203 its reverse (30200421021), we get a palindrome (42212821224).

The spelling of 12012400203 in words is "twelve billion, twelve million, four hundred thousand, two hundred three".