21210120210201 has 16 divisors (see below), whose sum is σ = 30456487500096. Its totient is φ = 13051982978496.

The previous prime is 21210120210127. The next prime is 21210120210217. The reversal of 21210120210201 is 10201202101212.

It is not a de Polignac number, because 21210120210201 - 2⁷ = 21210120210073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21210120210001) 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 15 ways as a sum of consecutive naturals, for example, 7010310 + ... + 9568943.

It is an arithmetic number, because the mean of its divisors is an integer number (1903530468756).

Almost surely, 2^{21210120210201} is an apocalyptic number.

It is an amenable number.

21210120210201 is a deficient number, since it is larger than the sum of its proper divisors (9246367289895).

21210120210201 is a wasteful number, since it uses less digits than its factorization.

21210120210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16612072.

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

Adding to 21210120210201 its reverse (10201202101212), we get a palindrome (31411322311413).

The spelling of 21210120210201 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty million, two hundred ten thousand, two hundred one".