20111123103 has 8 divisors (see below), whose sum is σ = 27010560048. Its totient is φ = 13309550784.

The previous prime is 20111123083. The next prime is 20111123107. The reversal of 20111123103 is 30132111102.

It is a happy number.

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

It is not a de Polignac number, because 20111123103 - 2¹⁶ = 20111057567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111123107) 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, 24465676 + ... + 24466497.

It is an arithmetic number, because the mean of its divisors is an integer number (3376320006).

Almost surely, 2^20111123103 is an apocalyptic number.

20111123103 is a deficient number, since it is larger than the sum of its proper divisors (6899436945).

20111123103 is a wasteful number, since it uses less digits than its factorization.

20111123103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48932313.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20111123103 its reverse (30132111102), we get a palindrome (50243234205).

The spelling of 20111123103 in words is "twenty billion, one hundred eleven million, one hundred twenty-three thousand, one hundred three".