21122222120011 has 8 divisors (see below), whose sum is σ = 21140503396848. Its totient is φ = 21103941516000.

The previous prime is 21122222119997. The next prime is 21122222120047. The reversal of 21122222120011 is 11002122222112.

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

It is a cyclic number.

It is not a de Polignac number, because 21122222120011 - 2²⁹ = 21121685249099 is a prime.

It is a super-2 number, since 2×21122222120011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122222120911) 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, 78486021 + ... + 78754681.

It is an arithmetic number, because the mean of its divisors is an integer number (2642562924606).

Almost surely, 2^{21122222120011} is an apocalyptic number.

21122222120011 is a deficient number, since it is larger than the sum of its proper divisors (18281276837).

21122222120011 is a wasteful number, since it uses less digits than its factorization.

21122222120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336413.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21122222120011 its reverse (11002122222112), we get a palindrome (32124344342123).

The spelling of 21122222120011 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty thousand, eleven".