12021002002 has 16 divisors (see below), whose sum is σ = 18537309720. Its totient is φ = 5842222848.

The previous prime is 12021001999. The next prime is 12021002089. The reversal of 12021002002 is 20020012021.

It can be written as a sum of positive squares in 4 ways, for example, as 11916123921 + 104878081 = 109161^2 + 10241^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12021002002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5833 + ... + 155164.

Almost surely, 2^12021002002 is an apocalyptic number.

12021002002 is a deficient number, since it is larger than the sum of its proper divisors (6516307718).

12021002002 is a wasteful number, since it uses less digits than its factorization.

12021002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162045.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 12021002002 its reverse (20020012021), we get a palindrome (32041014023).

The spelling of 12021002002 in words is "twelve billion, twenty-one million, two thousand, two".