21210120001201 has 8 divisors (see below), whose sum is σ = 22157251012224. Its totient is φ = 20265068313600.

The previous prime is 21210120001117. The next prime is 21210120001349. The reversal of 21210120001201 is 10210002101212.

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 21210120001201 - 2²⁹ = 21209583130289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210120008201) 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, 519810000 + ... + 519850801.

It is an arithmetic number, because the mean of its divisors is an integer number (2769656376528).

Almost surely, 2^{21210120001201} is an apocalyptic number.

It is an amenable number.

21210120001201 is a deficient number, since it is larger than the sum of its proper divisors (947131011023).

21210120001201 is a wasteful number, since it uses less digits than its factorization.

21210120001201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039661711.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21210120001201 its reverse (10210002101212), we get a palindrome (31420122102413).

The spelling of 21210120001201 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty million, one thousand, two hundred one".