12001020003 has 12 divisors (see below), whose sum is σ = 19811207728. Its totient is φ = 6857725680.

The previous prime is 12001019993. The next prime is 12001020011. The reversal of 12001020003 is 30002010021.

It is a happy number.

It is not a de Polignac number, because 12001020003 - 2⁸ = 12001019747 is a prime.

It is a super-2 number, since 2×12001020003² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001020403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95246128 + ... + 95246253.

Almost surely, 2^12001020003 is an apocalyptic number.

12001020003 is a deficient number, since it is larger than the sum of its proper divisors (7810187725).

12001020003 is a wasteful number, since it uses less digits than its factorization.

12001020003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190492394 (or 190492391 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 12001020003 its reverse (30002010021), we get a palindrome (42003030024).

The spelling of 12001020003 in words is "twelve billion, one million, twenty thousand, three".