21112201221201 has 48 divisors (see below), whose sum is σ = 32827394396160. Its totient is φ = 13544680401360.

The previous prime is 21112201221187. The next prime is 21112201221239. The reversal of 21112201221201 is 10212210221112.

21112201221201 is a `hidden beast` number, since 21 + 1 + 1 + 220 + 1 + 221 + 201 = 666.

It is not a de Polignac number, because 21112201221201 - 2⁹ = 21112201220689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112201221271) 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 47 ways as a sum of consecutive naturals, for example, 6480165 + ... + 9176978.

It is an arithmetic number, because the mean of its divisors is an integer number (683904049920).

Almost surely, 2^{21112201221201} is an apocalyptic number.

It is an amenable number.

21112201221201 is a deficient number, since it is larger than the sum of its proper divisors (11715193174959).

21112201221201 is a wasteful number, since it uses less digits than its factorization.

21112201221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15657368 (or 15657356 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21112201221201 its reverse (10212210221112), we get a palindrome (31324411442313).

The spelling of 21112201221201 in words is "twenty-one trillion, one hundred twelve billion, two hundred one million, two hundred twenty-one thousand, two hundred one".