21002100020130 has 64 divisors (see below), whose sum is σ = 53061916032000. Its totient is φ = 5305395775680.

The previous prime is 21002100020089. The next prime is 21002100020147. The reversal of 21002100020130 is 3102000120012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6262485 + ... + 9012375.

It is an arithmetic number, because the mean of its divisors is an integer number (829092438000).

Almost surely, 2^{21002100020130} is an apocalyptic number.

21002100020130 is an abundant number, since it is smaller than the sum of its proper divisors (32059816011870).

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

21002100020130 is a wasteful number, since it uses less digits than its factorization.

21002100020130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763319.

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

Adding to 21002100020130 its reverse (3102000120012), we get a palindrome (24104100140142).

The spelling of 21002100020130 in words is "twenty-one trillion, two billion, one hundred million, twenty thousand, one hundred thirty".