12421002002 has 4 divisors (see below), whose sum is σ = 18631503006. Its totient is φ = 6210501000.

The previous prime is 12421001987. The next prime is 12421002019. The reversal of 12421002002 is 20020012421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20020012421 = 1259 ⋅15901519.

It can be written as a sum of positive squares in only one way, i.e., 11389371841 + 1031630161 = 106721^2 + 32119^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3105250499 + ... + 3105250502.

Almost surely, 2^12421002002 is an apocalyptic number.

12421002002 is a deficient number, since it is larger than the sum of its proper divisors (6210501004).

12421002002 is an equidigital number, since it uses as much as digits as its factorization.

12421002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210501003.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12421002002 its reverse (20020012421), we get a palindrome (32441014423).

The spelling of 12421002002 in words is "twelve billion, four hundred twenty-one million, two thousand, two".