21231341204 has 12 divisors (see below), whose sum is σ = 37163683200. Its totient is φ = 10613146008.

The previous prime is 21231341167. The next prime is 21231341213. The reversal of 21231341204 is 40214313212.

It is a self number, because there is not a number n which added to its sum of digits gives 21231341204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612164 + ... + 645915.

It is an arithmetic number, because the mean of its divisors is an integer number (3096973600).

Almost surely, 2^21231341204 is an apocalyptic number.

It is an amenable number.

21231341204 is a deficient number, since it is larger than the sum of its proper divisors (15932341996).

21231341204 is a wasteful number, since it uses less digits than its factorization.

21231341204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262302 (or 1262300 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21231341204 its reverse (40214313212), we get a palindrome (61445654416).

The spelling of 21231341204 in words is "twenty-one billion, two hundred thirty-one million, three hundred forty-one thousand, two hundred four".