21210130130 has 16 divisors (see below), whose sum is σ = 43632267840. Its totient is φ = 7272044592.

The previous prime is 21210130091. The next prime is 21210130147. The reversal of 21210130130 is 3103101212.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 151500860 + ... + 151500999.

It is an arithmetic number, because the mean of its divisors is an integer number (2727016740).

Almost surely, 2^21210130130 is an apocalyptic number.

21210130130 is an abundant number, since it is smaller than the sum of its proper divisors (22422137710).

21210130130 is a wasteful number, since it uses less digits than its factorization.

21210130130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303001873.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21210130130 its reverse (3103101212), we get a palindrome (24313231342).

The spelling of 21210130130 in words is "twenty-one billion, two hundred ten million, one hundred thirty thousand, one hundred thirty".