212012000021 has 8 divisors (see below), whose sum is σ = 214121232000. Its totient is φ = 209911919440.

The previous prime is 212012000017. The next prime is 212012000041. The reversal of 212012000021 is 120000210212.

It is a happy number.

212012000021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212012000021 - 2² = 212012000017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212011999966 and 212012000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012000041) 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 7 ways as a sum of consecutive naturals, for example, 2241281 + ... + 2333958.

It is an arithmetic number, because the mean of its divisors is an integer number (26765154000).

Almost surely, 2^212012000021 is an apocalyptic number.

It is an amenable number.

212012000021 is a deficient number, since it is larger than the sum of its proper divisors (2109231979).

212012000021 is a wasteful number, since it uses less digits than its factorization.

212012000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4575699.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 212012000021 its reverse (120000210212), we get a palindrome (332012210233).

The spelling of 212012000021 in words is "two hundred twelve billion, twelve million, twenty-one", and thus it is an aban number.