20002100011111 has 4 divisors (see below), whose sum is σ = 20004616323000. Its totient is φ = 19999583699224.

The previous prime is 20002100011067. The next prime is 20002100011147. The reversal of 20002100011111 is 11111000120002.

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 20002100011111 - 2⁷ = 20002100010983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002100011181) 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, 1258144021 + ... + 1258159918.

It is an arithmetic number, because the mean of its divisors is an integer number (5001154080750).

Almost surely, 2^{20002100011111} is an apocalyptic number.

20002100011111 is a deficient number, since it is larger than the sum of its proper divisors (2516311889).

20002100011111 is an equidigital number, since it uses as much as digits as its factorization.

20002100011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516311888.

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

Adding to 20002100011111 its reverse (11111000120002), we get a palindrome (31113100131113).

The spelling of 20002100011111 in words is "twenty trillion, two billion, one hundred million, eleven thousand, one hundred eleven".