21213303134 has 8 divisors (see below), whose sum is σ = 31839760368. Its totient is φ = 10600049680.

The previous prime is 21213303127. The next prime is 21213303143. The reversal of 21213303134 is 43130331212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3296927 + ... + 3303354.

It is an arithmetic number, because the mean of its divisors is an integer number (3979970046).

Almost surely, 2^21213303134 is an apocalyptic number.

21213303134 is a deficient number, since it is larger than the sum of its proper divisors (10626457234).

21213303134 is a wasteful number, since it uses less digits than its factorization.

21213303134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6601890.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21213303134 its reverse (43130331212), we get a palindrome (64343634346).

The spelling of 21213303134 in words is "twenty-one billion, two hundred thirteen million, three hundred three thousand, one hundred thirty-four".