21224215234206 has 12 divisors (see below), whose sum is σ = 45985799674152. Its totient is φ = 7074738411396.

The previous prime is 21224215234163. The next prime is 21224215234253. The reversal of 21224215234206 is 60243251242212.

21224215234206 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 4 + 215 + 234 + 206 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589561534266 + ... + 589561534301.

It is an arithmetic number, because the mean of its divisors is an integer number (3832149972846).

Almost surely, 2^{21224215234206} is an apocalyptic number.

21224215234206 is an abundant number, since it is smaller than the sum of its proper divisors (24761584439946).

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

21224215234206 is a wasteful number, since it uses less digits than its factorization.

21224215234206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179123068575 (or 1179123068572 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 21224215234206 its reverse (60243251242212), we get a palindrome (81467466476418).

The spelling of 21224215234206 in words is "twenty-one trillion, two hundred twenty-four billion, two hundred fifteen million, two hundred thirty-four thousand, two hundred six".