13111111022123 has 4 divisors (see below), whose sum is σ = 13131501553128. Its totient is φ = 13090720491120.

The previous prime is 13111111022081. The next prime is 13111111022129. The reversal of 13111111022123 is 32122011111131.

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 13111111022123 - 2¹⁸ = 13111110759979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13111111022095 and 13111111022104.

It is not an unprimeable number, because it can be changed into a prime (13111111022129) 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, 10195264538 + ... + 10195265823.

It is an arithmetic number, because the mean of its divisors is an integer number (3282875388282).

Almost surely, 2^{13111111022123} is an apocalyptic number.

13111111022123 is a deficient number, since it is larger than the sum of its proper divisors (20390531005).

13111111022123 is an equidigital number, since it uses as much as digits as its factorization.

13111111022123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20390531004.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 13111111022123 its reverse (32122011111131), we get a palindrome (45233122133254).

The spelling of 13111111022123 in words is "thirteen trillion, one hundred eleven billion, one hundred eleven million, twenty-two thousand, one hundred twenty-three".