12011320403 has 16 divisors (see below), whose sum is σ = 12845952000. Its totient is φ = 11191389312.

The previous prime is 12011320381. The next prime is 12011320441. The reversal of 12011320403 is 30402311021.

It is a cyclic number.

It is not a de Polignac number, because 12011320403 - 2⁶ = 12011320339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011320103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 841238 + ... + 855396.

It is an arithmetic number, because the mean of its divisors is an integer number (802872000).

Almost surely, 2^12011320403 is an apocalyptic number.

12011320403 is a deficient number, since it is larger than the sum of its proper divisors (834631597).

12011320403 is a wasteful number, since it uses less digits than its factorization.

12011320403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14674.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12011320403 its reverse (30402311021), we get a palindrome (42413631424).

The spelling of 12011320403 in words is "twelve billion, eleven million, three hundred twenty thousand, four hundred three".