20001002201111 has 4 divisors (see below), whose sum is σ = 20001468913800. Its totient is φ = 20000535488424.

The previous prime is 20001002201083. The next prime is 20001002201123. The reversal of 20001002201111 is 11110220010002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20001002201111 - 2¹⁰ = 20001002200087 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001002201092 and 20001002201101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001002201611) 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 3 ways as a sum of consecutive naturals, for example, 233292056 + ... + 233377773.

It is an arithmetic number, because the mean of its divisors is an integer number (5000367228450).

Almost surely, 2^{20001002201111} is an apocalyptic number.

20001002201111 is a deficient number, since it is larger than the sum of its proper divisors (466712689).

20001002201111 is an equidigital number, since it uses as much as digits as its factorization.

20001002201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466712688.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20001002201111 its reverse (11110220010002), we get a palindrome (31111222211113).

The spelling of 20001002201111 in words is "twenty trillion, one billion, two million, two hundred one thousand, one hundred eleven".