21212201102211 has 96 divisors (see below), whose sum is σ = 35906336514048. Its totient is φ = 11814606578880.

The previous prime is 21212201102179. The next prime is 21212201102269. The reversal of 21212201102211 is 11220110221212.

21212201102211 is a `hidden beast` number, since 2 + 121 + 220 + 110 + 2 + 211 = 666.

It is not a de Polignac number, because 21212201102211 - 2⁵ = 21212201102179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212201102311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3170255376 + ... + 3170262066.

It is an arithmetic number, because the mean of its divisors is an integer number (374024338688).

Almost surely, 2^{21212201102211} is an apocalyptic number.

21212201102211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21212201102211 is a deficient number, since it is larger than the sum of its proper divisors (14694135411837).

21212201102211 is a wasteful number, since it uses less digits than its factorization.

21212201102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9021 (or 9018 counting only the distinct ones).

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

Adding to 21212201102211 its reverse (11220110221212), we get a palindrome (32432311323423).

The spelling of 21212201102211 in words is "twenty-one trillion, two hundred twelve billion, two hundred one million, one hundred two thousand, two hundred eleven".