21002142130 has 16 divisors (see below), whose sum is σ = 38683016064. Its totient is φ = 8205487920.

The previous prime is 21002142107. The next prime is 21002142163. The reversal of 21002142130 is 3124120012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24420666 + ... + 24421525.

It is an arithmetic number, because the mean of its divisors is an integer number (2417688504).

Almost surely, 2^21002142130 is an apocalyptic number.

21002142130 is a deficient number, since it is larger than the sum of its proper divisors (17680873934).

21002142130 is a wasteful number, since it uses less digits than its factorization.

21002142130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48842241.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21002142130 its reverse (3124120012), we get a palindrome (24126262142).

The spelling of 21002142130 in words is "twenty-one billion, two million, one hundred forty-two thousand, one hundred thirty".