21417122206 has 8 divisors (see below), whose sum is σ = 34015429440. Its totient is φ = 10078645728.

The previous prime is 21417122173. The next prime is 21417122219. The reversal of 21417122206 is 60222171412.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314957646 + ... + 314957713.

It is an arithmetic number, because the mean of its divisors is an integer number (4251928680).

Almost surely, 2^21417122206 is an apocalyptic number.

21417122206 is a deficient number, since it is larger than the sum of its proper divisors (12598307234).

21417122206 is a wasteful number, since it uses less digits than its factorization.

21417122206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629915378.

The product of its (nonzero) digits is 2688, while the sum is 28.

Adding to 21417122206 its reverse (60222171412), we get a palindrome (81639293618).

The spelling of 21417122206 in words is "twenty-one billion, four hundred seventeen million, one hundred twenty-two thousand, two hundred six".