20210111100111 has 4 divisors (see below), whose sum is σ = 26946814800152. Its totient is φ = 13473407400072.

The previous prime is 20210111100061. The next prime is 20210111100131. The reversal of 20210111100111 is 11100111101202.

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

It is not a de Polignac number, because 20210111100111 - 2¹⁵ = 20210111067343 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 (20210111100131) 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, 3368351850016 + ... + 3368351850021.

It is an arithmetic number, because the mean of its divisors is an integer number (6736703700038).

Almost surely, 2^{20210111100111} is an apocalyptic number.

20210111100111 is a deficient number, since it is larger than the sum of its proper divisors (6736703700041).

20210111100111 is an equidigital number, since it uses as much as digits as its factorization.

20210111100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6736703700040.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 20210111100111 its reverse (11100111101202), we get a palindrome (31310222201313).

The spelling of 20210111100111 in words is "twenty trillion, two hundred ten billion, one hundred eleven million, one hundred thousand, one hundred eleven".