212000022009 has 16 divisors (see below), whose sum is σ = 314104811200. Its totient is φ = 141319531008.

The previous prime is 212000022007. The next prime is 212000022089. The reversal of 212000022009 is 900220000212.

It is not a de Polignac number, because 212000022009 - 2¹ = 212000022007 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212000021982 and 212000022000.

It is not an unprimeable number, because it can be changed into a prime (212000022007) 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 15 ways as a sum of consecutive naturals, for example, 98659 + ... + 658584.

It is an arithmetic number, because the mean of its divisors is an integer number (19631550700).

Almost surely, 2^212000022009 is an apocalyptic number.

It is an amenable number.

212000022009 is a deficient number, since it is larger than the sum of its proper divisors (102104789191).

212000022009 is a wasteful number, since it uses less digits than its factorization.

212000022009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767621 (or 767615 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The spelling of 212000022009 in words is "two hundred twelve billion, twenty-two thousand, nine".