212010010000021 has 8 divisors (see below), whose sum is σ = 215951141192480. Its totient is φ = 208091725945488.

The previous prime is 212010010000007. The next prime is 212010010000037. The reversal of 212010010000021 is 120000010010212.

212010010000021 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 a de Polignac number, because none of the positive numbers 2^k-212010010000021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212010009999962 and 212010010000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212010010000051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5711765751 + ... + 5711802868.

It is an arithmetic number, because the mean of its divisors is an integer number (26993892649060).

Almost surely, 2^{212010010000021} is an apocalyptic number.

It is an amenable number.

212010010000021 is a deficient number, since it is larger than the sum of its proper divisors (3941131192459).

212010010000021 is a wasteful number, since it uses less digits than its factorization.

212010010000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11423568963.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 212010010000021 its reverse (120000010010212), we get a palindrome (332010020010233).

The spelling of 212010010000021 in words is "two hundred twelve trillion, ten billion, ten million, twenty-one", and thus it is an aban number.