21210201212201 has 16 divisors (see below), whose sum is σ = 22018762567296. Its totient is φ = 20416435917696.

The previous prime is 21210201212183. The next prime is 21210201212203. The reversal of 21210201212201 is 10221210201212.

It is not a de Polignac number, because 21210201212201 - 2¹⁴ = 21210201195817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21210201212201.

It is not an unprimeable number, because it can be changed into a prime (21210201212203) 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 15 ways as a sum of consecutive naturals, for example, 1076531 + ... + 6601463.

It is an arithmetic number, because the mean of its divisors is an integer number (1376172660456).

Almost surely, 2^{21210201212201} is an apocalyptic number.

It is an amenable number.

21210201212201 is a deficient number, since it is larger than the sum of its proper divisors (808561355095).

21210201212201 is a wasteful number, since it uses less digits than its factorization.

21210201212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5526272.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21210201212201 its reverse (10221210201212), we get a palindrome (31431411413413).

The spelling of 21210201212201 in words is "twenty-one trillion, two hundred ten billion, two hundred one million, two hundred twelve thousand, two hundred one".