21210000212001 has 8 divisors (see below), whose sum is σ = 29044324614784. Its totient is φ = 13757837975280.

The previous prime is 21210000211979. The next prime is 21210000212017. The reversal of 21210000212001 is 10021200001212.

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

It is not a de Polignac number, because 21210000212001 - 2¹⁴ = 21210000195617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210000212101) 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, 95540541385 + ... + 95540541606.

It is an arithmetic number, because the mean of its divisors is an integer number (3630540576848).

Almost surely, 2^{21210000212001} is an apocalyptic number.

It is an amenable number.

21210000212001 is a deficient number, since it is larger than the sum of its proper divisors (7834324402783).

21210000212001 is a wasteful number, since it uses less digits than its factorization.

21210000212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191081083031.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21210000212001 its reverse (10021200001212), we get a palindrome (31231200213213).

The spelling of 21210000212001 in words is "twenty-one trillion, two hundred ten billion, two hundred twelve thousand, one".