21213543315106 has 8 divisors (see below), whose sum is σ = 33203806928064. Its totient is φ = 10145607672420.

The previous prime is 21213543315073. The next prime is 21213543315143. The reversal of 21213543315106 is 60151334531212.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230581992510 + ... + 230581992601.

It is an arithmetic number, because the mean of its divisors is an integer number (4150475866008).

Almost surely, 2^{21213543315106} is an apocalyptic number.

21213543315106 is a deficient number, since it is larger than the sum of its proper divisors (11990263612958).

21213543315106 is a wasteful number, since it uses less digits than its factorization.

21213543315106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461163985136.

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 21213543315106 its reverse (60151334531212), we get a palindrome (81364877846318).

The spelling of 21213543315106 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred fifteen thousand, one hundred six".