12440421002 has 16 divisors (see below), whose sum is σ = 18728674440. Its totient is φ = 6197548032.

The previous prime is 12440421001. The next prime is 12440421047. The reversal of 12440421002 is 20012404421.

It can be written as a sum of positive squares in 4 ways, for example, as 8606458441 + 3833962561 = 92771^2 + 61919^2 .

It is not an unprimeable number, because it can be changed into a prime (12440421001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2582348 + ... + 2587160.

Almost surely, 2^12440421002 is an apocalyptic number.

12440421002 is a deficient number, since it is larger than the sum of its proper divisors (6288253438).

12440421002 is a wasteful number, since it uses less digits than its factorization.

12440421002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9257.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 12440421002 its reverse (20012404421), we get a palindrome (32452825423).

The spelling of 12440421002 in words is "twelve billion, four hundred forty million, four hundred twenty-one thousand, two".