212121212001 has 8 divisors (see below), whose sum is σ = 299465240544. Its totient is φ = 133095662400.

The previous prime is 212121211987. The next prime is 212121212021. The reversal of 212121212001 is 100212121212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212121212001 - 2⁷ = 212121211873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212121212021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2079619675 + ... + 2079619776.

It is an arithmetic number, because the mean of its divisors is an integer number (37433155068).

Almost surely, 2^212121212001 is an apocalyptic number.

It is an amenable number.

212121212001 is a deficient number, since it is larger than the sum of its proper divisors (87344028543).

212121212001 is a wasteful number, since it uses less digits than its factorization.

212121212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159239471.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212121212001 its reverse (100212121212), we get a palindrome (312333333213).

The spelling of 212121212001 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, one".