12021003403 has 4 divisors (see below), whose sum is σ = 12022347040. Its totient is φ = 12019659768.

The previous prime is 12021003389. The next prime is 12021003419. The reversal of 12021003403 is 30430012021.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12021003403 - 2⁹ = 12021002891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021003473) 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, 658308 + ... + 676321.

It is an arithmetic number, because the mean of its divisors is an integer number (3005586760).

Almost surely, 2^12021003403 is an apocalyptic number.

12021003403 is a deficient number, since it is larger than the sum of its proper divisors (1343637).

12021003403 is an equidigital number, since it uses as much as digits as its factorization.

12021003403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343636.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 12021003403 its reverse (30430012021), we get a palindrome (42451015424).

The spelling of 12021003403 in words is "twelve billion, twenty-one million, three thousand, four hundred three".