20200123001111 has 4 divisors (see below), whose sum is σ = 20443497977112. Its totient is φ = 19956748025112.

The previous prime is 20200123001083. The next prime is 20200123001131. The reversal of 20200123001111 is 11110032100202.

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 20200123001111 - 2¹⁰ = 20200123000087 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 (20200123001131) 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, 121687487876 + ... + 121687488041.

It is an arithmetic number, because the mean of its divisors is an integer number (5110874494278).

Almost surely, 2^{20200123001111} is an apocalyptic number.

20200123001111 is a deficient number, since it is larger than the sum of its proper divisors (243374976001).

20200123001111 is an equidigital number, since it uses as much as digits as its factorization.

20200123001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243374976000.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20200123001111 its reverse (11110032100202), we get a palindrome (31310155101313).

Subtracting from 20200123001111 its reverse (11110032100202), we obtain a palindrome (9090090900909).

The spelling of 20200123001111 in words is "twenty trillion, two hundred billion, one hundred twenty-three million, one thousand, one hundred eleven".