212021212201209 has 24 divisors (see below), whose sum is σ = 311292130653504. Its totient is φ = 139021937388000.

The previous prime is 212021212201133. The next prime is 212021212201213. The reversal of 212021212201209 is 902102212120212.

212021212201209 is a `hidden beast` number, since 2 + 1 + 20 + 21 + 212 + 201 + 209 = 666.

It is not a de Polignac number, because 212021212201209 - 2⁷ = 212021212201081 is a prime.

It is a super-2 number, since 2×212021212201209² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212021212221209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2480287 + ... + 20741124.

It is an arithmetic number, because the mean of its divisors is an integer number (12970505443896).

Almost surely, 2^{212021212201209} is an apocalyptic number.

It is an amenable number.

212021212201209 is a deficient number, since it is larger than the sum of its proper divisors (99270918452295).

212021212201209 is a wasteful number, since it uses less digits than its factorization.

212021212201209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23238109 (or 23238106 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 212021212201209 in words is "two hundred twelve trillion, twenty-one billion, two hundred twelve million, two hundred one thousand, two hundred nine".