21122201202111 has 24 divisors (see below), whose sum is σ = 30594214622816. Its totient is φ = 14042575834560.

The previous prime is 21122201202103. The next prime is 21122201202241. The reversal of 21122201202111 is 11120210222112.

21122201202111 is a `hidden beast` number, since 2 + 112 + 220 + 120 + 211 + 1 = 666.

It is not a de Polignac number, because 21122201202111 - 2³ = 21122201202103 is a prime.

It is a super-2 number, since 2×21122201202111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122201203111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3337326 + ... + 7306308.

Almost surely, 2^{21122201202111} is an apocalyptic number.

21122201202111 is a deficient number, since it is larger than the sum of its proper divisors (9472013420705).

21122201202111 is a wasteful number, since it uses less digits than its factorization.

21122201202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3970623 (or 3970620 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21122201202111 its reverse (11120210222112), we get a palindrome (32242411424223).

The spelling of 21122201202111 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred one million, two hundred two thousand, one hundred eleven".