20123111132103 has 8 divisors (see below), whose sum is σ = 30663788391808. Its totient is φ = 11498920646904.

The previous prime is 20123111132093. The next prime is 20123111132141. The reversal of 20123111132103 is 30123111132102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20123111132103 - 2²² = 20123106937799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 958243387243 = 20123111132103 / (2 + 0 + 1 + 2 + 3 + 1 + 1 + 1 + 1 + 3 + 2 + 1 + 0 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20123111132103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123111132203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479121693601 + ... + 479121693642.

It is an arithmetic number, because the mean of its divisors is an integer number (3832973548976).

Almost surely, 2^{20123111132103} is an apocalyptic number.

20123111132103 is a deficient number, since it is larger than the sum of its proper divisors (10540677259705).

20123111132103 is an equidigital number, since it uses as much as digits as its factorization.

20123111132103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958243387253.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 20123111132103 its reverse (30123111132102), we get a palindrome (50246222264205).

Subtracting 20123111132103 from its reverse (30123111132102), we obtain a palindrome (9999999999999).

The spelling of 20123111132103 in words is "twenty trillion, one hundred twenty-three billion, one hundred eleven million, one hundred thirty-two thousand, one hundred three".