20201021200111 has 4 divisors (see below), whose sum is σ = 20209358396592. Its totient is φ = 20192684003632.

The previous prime is 20201021200043. The next prime is 20201021200123. The reversal of 20201021200111 is 11100212010202.

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 20201021200111 - 2³⁵ = 20166661461743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201021200091 and 20201021200100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201021200181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4168594606 + ... + 4168599451.

It is an arithmetic number, because the mean of its divisors is an integer number (5052339599148).

Almost surely, 2^{20201021200111} is an apocalyptic number.

20201021200111 is a deficient number, since it is larger than the sum of its proper divisors (8337196481).

20201021200111 is an equidigital number, since it uses as much as digits as its factorization.

20201021200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8337196480.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20201021200111 its reverse (11100212010202), we get a palindrome (31301233210313).

The spelling of 20201021200111 in words is "twenty trillion, two hundred one billion, twenty-one million, two hundred thousand, one hundred eleven".