21213566234206 has 8 divisors (see below), whose sum is σ = 31838838809904. Its totient is φ = 10600619964240.

The previous prime is 21213566234167. The next prime is 21213566234291. The reversal of 21213566234206 is 60243266531212.

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

It is a congruent number.

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, 3081572130 + ... + 3081579013.

It is an arithmetic number, because the mean of its divisors is an integer number (3979854851238).

Almost surely, 2^{21213566234206} is an apocalyptic number.

21213566234206 is a deficient number, since it is larger than the sum of its proper divisors (10625272575698).

21213566234206 is a wasteful number, since it uses less digits than its factorization.

21213566234206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6163152866.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 21213566234206 in words is "twenty-one trillion, two hundred thirteen billion, five hundred sixty-six million, two hundred thirty-four thousand, two hundred six".