212102021200021 has 8 divisors (see below), whose sum is σ = 212134609397984. Its totient is φ = 212069435379120.

The previous prime is 212102021199961. The next prime is 212102021200049. The reversal of 212102021200021 is 120002120201212.

It is a happy number.

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 212102021200021 - 2³⁵ = 212067661461653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212102021199968 and 212102021200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102021290021) 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 7 ways as a sum of consecutive naturals, for example, 182170006 + ... + 183330616.

It is an arithmetic number, because the mean of its divisors is an integer number (26516826174748).

Almost surely, 2^{212102021200021} is an apocalyptic number.

It is an amenable number.

212102021200021 is a deficient number, since it is larger than the sum of its proper divisors (32588197963).

212102021200021 is a wasteful number, since it uses less digits than its factorization.

212102021200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188531.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212102021200021 its reverse (120002120201212), we get a palindrome (332104141401233).

The spelling of 212102021200021 in words is "two hundred twelve trillion, one hundred two billion, twenty-one million, two hundred thousand, twenty-one".