21222120200111 has 8 divisors (see below), whose sum is σ = 21297871399248. Its totient is φ = 21146370616000.

The previous prime is 21222120200089. The next prime is 21222120200123. The reversal of 21222120200111 is 11100202122212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222120200111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21222120200111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222120200161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30001481 + ... + 30700701.

It is an arithmetic number, because the mean of its divisors is an integer number (2662233924906).

Almost surely, 2^{21222120200111} is an apocalyptic number.

21222120200111 is a deficient number, since it is larger than the sum of its proper divisors (75751199137).

21222120200111 is a wasteful number, since it uses less digits than its factorization.

21222120200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807513.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21222120200111 its reverse (11100202122212), we get a palindrome (32322322322323).

The spelling of 21222120200111 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty million, two hundred thousand, one hundred eleven".