11503412123303 has 4 divisors (see below), whose sum is σ = 11525407175688. Its totient is φ = 11481417070920.

The previous prime is 11503412123243. The next prime is 11503412123323. The reversal of 11503412123303 is 30332121430511.

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 11503412123303 - 2¹⁸ = 11503411861159 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 (11503412123323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10997525408 + ... + 10997526453.

It is an arithmetic number, because the mean of its divisors is an integer number (2881351793922).

Almost surely, 2^{11503412123303} is an apocalyptic number.

11503412123303 is a deficient number, since it is larger than the sum of its proper divisors (21995052385).

11503412123303 is an equidigital number, since it uses as much as digits as its factorization.

11503412123303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21995052384.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 11503412123303 its reverse (30332121430511), we get a palindrome (41835533553814).

The spelling of 11503412123303 in words is "eleven trillion, five hundred three billion, four hundred twelve million, one hundred twenty-three thousand, three hundred three".