21215360130 has 16 divisors (see below), whose sum is σ = 50916864384. Its totient is φ = 5657429360.

The previous prime is 21215360123. The next prime is 21215360143. The reversal of 21215360130 is 3106351212.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21215360130.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353589306 + ... + 353589365.

It is an arithmetic number, because the mean of its divisors is an integer number (3182304024).

Almost surely, 2^21215360130 is an apocalyptic number.

21215360130 is an abundant number, since it is smaller than the sum of its proper divisors (29701504254).

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

21215360130 is a wasteful number, since it uses less digits than its factorization.

21215360130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707178681.

The product of its (nonzero) digits is 1080, while the sum is 24.

The spelling of 21215360130 in words is "twenty-one billion, two hundred fifteen million, three hundred sixty thousand, one hundred thirty".