21266216632222 has 8 divisors (see below), whose sum is σ = 32677357264272. Its totient is φ = 10373764210800.

The previous prime is 21266216632217. The next prime is 21266216632277. The reversal of 21266216632222 is 22223661266212.

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, 129672052554 + ... + 129672052717.

It is an arithmetic number, because the mean of its divisors is an integer number (4084669658034).

Almost surely, 2^{21266216632222} is an apocalyptic number.

21266216632222 is a deficient number, since it is larger than the sum of its proper divisors (11411140632050).

21266216632222 is a wasteful number, since it uses less digits than its factorization.

21266216632222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259344105314.

The product of its digits is 497664, while the sum is 43.

Adding to 21266216632222 its reverse (22223661266212), we get a palindrome (43489877898434).

The spelling of 21266216632222 in words is "twenty-one trillion, two hundred sixty-six billion, two hundred sixteen million, six hundred thirty-two thousand, two hundred twenty-two".