12001001203 has 4 divisors (see below), whose sum is σ = 12522783888. Its totient is φ = 11479218520.

The previous prime is 12001001149. The next prime is 12001001239. The reversal of 12001001203 is 30210010021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30210010021 = 17 ⋅1777059413.

It is a cyclic number.

It is not a de Polignac number, because 12001001203 - 2⁹ = 12001000691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12001001203.

It is not an unprimeable number, because it can be changed into a prime (12001001273) 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, 260891308 + ... + 260891353.

It is an arithmetic number, because the mean of its divisors is an integer number (3130695972).

Almost surely, 2^12001001203 is an apocalyptic number.

12001001203 is a deficient number, since it is larger than the sum of its proper divisors (521782685).

12001001203 is an equidigital number, since it uses as much as digits as its factorization.

12001001203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521782684.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 12001001203 its reverse (30210010021), we get a palindrome (42211011224).

The spelling of 12001001203 in words is "twelve billion, one million, one thousand, two hundred three".