21000130002130 has 16 divisors (see below), whose sum is σ = 37936696947480. Its totient is φ = 8369726902272.

The previous prime is 21000130002079. The next prime is 21000130002169. The reversal of 21000130002130 is 3120003100012.

It can be written as a sum of positive squares in 4 ways, for example, as 19106751250129 + 1893378752001 = 4371127^2 + 1376001^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21000130002130.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3790634415 + ... + 3790639954.

Almost surely, 2^{21000130002130} is an apocalyptic number.

21000130002130 is a deficient number, since it is larger than the sum of its proper divisors (16936566945350).

21000130002130 is a wasteful number, since it uses less digits than its factorization.

21000130002130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7581274653.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21000130002130 its reverse (3120003100012), we get a palindrome (24120133102142).

The spelling of 21000130002130 in words is "twenty-one trillion, one hundred thirty million, two thousand, one hundred thirty".