21230203130215 has 16 divisors (see below), whose sum is σ = 26298246078720. Its totient is φ = 16436168789760.

The previous prime is 21230203130209. The next prime is 21230203130231. The reversal of 21230203130215 is 51203130203212.

It is a de Polignac number, because none of the positive numbers 2^k-21230203130215 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21230203130215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25800627 + ... + 26610763.

It is an arithmetic number, because the mean of its divisors is an integer number (1643640379920).

Almost surely, 2^{21230203130215} is an apocalyptic number.

21230203130215 is a deficient number, since it is larger than the sum of its proper divisors (5068042948505).

21230203130215 is a wasteful number, since it uses less digits than its factorization.

21230203130215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979242.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21230203130215 its reverse (51203130203212), we get a palindrome (72433333333427).

The spelling of 21230203130215 in words is "twenty-one trillion, two hundred thirty billion, two hundred three million, one hundred thirty thousand, two hundred fifteen".