20001102020111 has 4 divisors (see below), whose sum is σ = 20001114553800. Its totient is φ = 20001089486424.

The previous prime is 20001102020087. The next prime is 20001102020113. The reversal of 20001102020111 is 11102020110002.

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 20001102020111 - 2⁶ = 20001102020047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001102020092 and 20001102020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001102020113) 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 3 ways as a sum of consecutive naturals, for example, 3451601 + ... + 7205258.

It is an arithmetic number, because the mean of its divisors is an integer number (5000278638450).

Almost surely, 2^{20001102020111} is an apocalyptic number.

20001102020111 is a deficient number, since it is larger than the sum of its proper divisors (12533689).

20001102020111 is a wasteful number, since it uses less digits than its factorization.

20001102020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12533688.

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

Adding to 20001102020111 its reverse (11102020110002), we get a palindrome (31103122130113).

The spelling of 20001102020111 in words is "twenty trillion, one billion, one hundred two million, twenty thousand, one hundred eleven".