11503302123 has 16 divisors (see below), whose sum is σ = 15668997120. Its totient is φ = 7503340416.

The previous prime is 11503302119. The next prime is 11503302143. The reversal of 11503302123 is 32120330511.

It is not a de Polignac number, because 11503302123 - 2² = 11503302119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11503302123.

It is not an unprimeable number, because it can be changed into a prime (11503302143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513411 + ... + 535347.

It is an arithmetic number, because the mean of its divisors is an integer number (979312320).

Almost surely, 2^11503302123 is an apocalyptic number.

11503302123 is a deficient number, since it is larger than the sum of its proper divisors (4165694997).

11503302123 is a wasteful number, since it uses less digits than its factorization.

11503302123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25706.

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 11503302123 its reverse (32120330511), we get a palindrome (43623632634).

The spelling of 11503302123 in words is "eleven billion, five hundred three million, three hundred two thousand, one hundred twenty-three".