21124213230 has 32 divisors (see below), whose sum is σ = 51412174848. Its totient is φ = 5553783200.

The previous prime is 21124213213. The next prime is 21124213241. The reversal of 21124213230 is 3231242112.

21124213230 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21124213197 and 21124213206.

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, 4956606 + ... + 4960865.

It is an arithmetic number, because the mean of its divisors is an integer number (1606630464).

Almost surely, 2^21124213230 is an apocalyptic number.

21124213230 is an abundant number, since it is smaller than the sum of its proper divisors (30287961618).

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

21124213230 is a wasteful number, since it uses less digits than its factorization.

21124213230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9917552.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21124213230 its reverse (3231242112), we get a palindrome (24355455342).

The spelling of 21124213230 in words is "twenty-one billion, one hundred twenty-four million, two hundred thirteen thousand, two hundred thirty".