20101123112311 has 4 divisors (see below), whose sum is σ = 20134238636992. Its totient is φ = 20068007587632.

The previous prime is 20101123112267. The next prime is 20101123112363. The reversal of 20101123112311 is 11321132110102.

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 20101123112311 - 2¹³ = 20101123104119 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 (20101123112711) 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, 16557761430 + ... + 16557762643.

It is an arithmetic number, because the mean of its divisors is an integer number (5033559659248).

Almost surely, 2^{20101123112311} is an apocalyptic number.

20101123112311 is a deficient number, since it is larger than the sum of its proper divisors (33115524681).

20101123112311 is an equidigital number, since it uses as much as digits as its factorization.

20101123112311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33115524680.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 20101123112311 its reverse (11321132110102), we get a palindrome (31422255222413).

The spelling of 20101123112311 in words is "twenty trillion, one hundred one billion, one hundred twenty-three million, one hundred twelve thousand, three hundred eleven".