12212121220011 has 6 divisors (see below), whose sum is σ = 17639730651140. Its totient is φ = 8141414146668.

The previous prime is 12212121219989. The next prime is 12212121220021. The reversal of 12212121220011 is 11002212121221.

12212121220011 is a `hidden beast` number, since 1 + 221 + 21 + 212 + 200 + 11 = 666.

It is not a de Polignac number, because 12212121220011 - 2¹⁰ = 12212121218987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12212121220021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 678451178881 + ... + 678451178898.

Almost surely, 2^{12212121220011} is an apocalyptic number.

12212121220011 is a deficient number, since it is larger than the sum of its proper divisors (5427609431129).

12212121220011 is a wasteful number, since it uses less digits than its factorization.

12212121220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356902357785 (or 1356902357782 counting only the distinct ones).

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

Adding to 12212121220011 its reverse (11002212121221), we get a palindrome (23214333341232).

The spelling of 12212121220011 in words is "twelve trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty thousand, eleven".