21210213212230 has 64 divisors (see below), whose sum is σ = 46194368117760. Its totient is φ = 6849509606784.

The previous prime is 21210213212219. The next prime is 21210213212339. The reversal of 21210213212230 is 3221231201212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45861034 + ... + 46321213.

It is an arithmetic number, because the mean of its divisors is an integer number (721787001840).

Almost surely, 2^{21210213212230} is an apocalyptic number.

21210213212230 is an abundant number, since it is smaller than the sum of its proper divisors (24984154905530).

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

21210213212230 is a wasteful number, since it uses less digits than its factorization.

21210213212230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92182453.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21210213212230 its reverse (3221231201212), we get a palindrome (24431444413442).

The spelling of 21210213212230 in words is "twenty-one trillion, two hundred ten billion, two hundred thirteen million, two hundred twelve thousand, two hundred thirty".