20100021110111 has 4 divisors (see below), whose sum is σ = 20139981391152. Its totient is φ = 20060060829072.

The previous prime is 20100021110027. The next prime is 20100021110149. The reversal of 20100021110111 is 11101112000102.

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 20100021110111 - 2³⁸ = 19825143203167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100021110092 and 20100021110101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100021119111) 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, 19980139766 + ... + 19980140771.

It is an arithmetic number, because the mean of its divisors is an integer number (5034995347788).

Almost surely, 2^{20100021110111} is an apocalyptic number.

20100021110111 is a deficient number, since it is larger than the sum of its proper divisors (39960281041).

20100021110111 is an equidigital number, since it uses as much as digits as its factorization.

20100021110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39960281040.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20100021110111 its reverse (11101112000102), we get a palindrome (31201133110213).

The spelling of 20100021110111 in words is "twenty trillion, one hundred billion, twenty-one million, one hundred ten thousand, one hundred eleven".