20001111100201 has 16 divisors (see below), whose sum is σ = 24967198061568. Its totient is φ = 15566063965200.

The previous prime is 20001111100141. The next prime is 20001111100261. The reversal of 20001111100201 is 10200111110002.

It is an interprime number because it is at equal distance from previous prime (20001111100141) and next prime (20001111100261).

It is not a de Polignac number, because 20001111100201 - 2³¹ = 19998963616553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001111100261) 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, 160082245 + ... + 160207138.

It is an arithmetic number, because the mean of its divisors is an integer number (1560449878848).

Almost surely, 2^{20001111100201} is an apocalyptic number.

It is an amenable number.

20001111100201 is a deficient number, since it is larger than the sum of its proper divisors (4966086961367).

20001111100201 is a wasteful number, since it uses less digits than its factorization.

20001111100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320290212.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20001111100201 its reverse (10200111110002), we get a palindrome (30201222210203).

The spelling of 20001111100201 in words is "twenty trillion, one billion, one hundred eleven million, one hundred thousand, two hundred one".