21222101122011 has 12 divisors (see below), whose sum is σ = 30656819463192. Its totient is φ = 14146833538656.

The previous prime is 21222101121997. The next prime is 21222101122091. The reversal of 21222101122011 is 11022110122212.

21222101122011 is a `hidden beast` number, since 212 + 2 + 210 + 11 + 220 + 11 = 666.

It is not a de Polignac number, because 21222101122011 - 2¹¹ = 21222101119963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222101122091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102714066 + ... + 102920471.

It is an arithmetic number, because the mean of its divisors is an integer number (2554734955266).

Almost surely, 2^{21222101122011} is an apocalyptic number.

21222101122011 is a deficient number, since it is larger than the sum of its proper divisors (9434718341181).

21222101122011 is a wasteful number, since it uses less digits than its factorization.

21222101122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205646010 (or 205646007 counting only the distinct ones).

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

Adding to 21222101122011 its reverse (11022110122212), we get a palindrome (32244211244223).

The spelling of 21222101122011 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred one million, one hundred twenty-two thousand, eleven".