20001100122201 has 32 divisors (see below), whose sum is σ = 30573649041408. Its totient is φ = 11519975355840.

The previous prime is 20001100122187. The next prime is 20001100122271. The reversal of 20001100122201 is 10222100110002.

It is not a de Polignac number, because 20001100122201 - 2¹⁸ = 20001099860057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001100122271) 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 31 ways as a sum of consecutive naturals, for example, 190423281 + ... + 190528286.

It is an arithmetic number, because the mean of its divisors is an integer number (955426532544).

Almost surely, 2^{20001100122201} is an apocalyptic number.

It is an amenable number.

20001100122201 is a deficient number, since it is larger than the sum of its proper divisors (10572548919207).

20001100122201 is a wasteful number, since it uses less digits than its factorization.

20001100122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380951661.

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

Adding to 20001100122201 its reverse (10222100110002), we get a palindrome (30223200232203).

The spelling of 20001100122201 in words is "twenty trillion, one billion, one hundred million, one hundred twenty-two thousand, two hundred one".