21120002130 has 16 divisors (see below), whose sum is σ = 50688005184. Its totient is φ = 5632000560.

The previous prime is 21120002117. The next prime is 21120002179. The reversal of 21120002130 is 3120002112.

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, 352000006 + ... + 352000065.

It is an arithmetic number, because the mean of its divisors is an integer number (3168000324).

Almost surely, 2^21120002130 is an apocalyptic number.

21120002130 is an abundant number, since it is smaller than the sum of its proper divisors (29568003054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120002130 is a wasteful number, since it uses less digits than its factorization.

21120002130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704000081.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21120002130 its reverse (3120002112), we get a palindrome (24240004242).

The spelling of 21120002130 in words is "twenty-one billion, one hundred twenty million, two thousand, one hundred thirty".