11131220323 has 4 divisors (see below), whose sum is σ = 11615186448. Its totient is φ = 10647254200.

The previous prime is 11131220297. The next prime is 11131220329. The reversal of 11131220323 is 32302213111.

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 11131220323 - 2⁵ = 11131220291 is a prime.

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 11131220323.

It is not an unprimeable number, because it can be changed into a prime (11131220329) 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 3 ways as a sum of consecutive naturals, for example, 241983028 + ... + 241983073.

It is an arithmetic number, because the mean of its divisors is an integer number (2903796612).

Almost surely, 2^11131220323 is an apocalyptic number.

11131220323 is a deficient number, since it is larger than the sum of its proper divisors (483966125).

11131220323 is an equidigital number, since it uses as much as digits as its factorization.

11131220323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483966124.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11131220323 its reverse (32302213111), we get a palindrome (43433433434).

The spelling of 11131220323 in words is "eleven billion, one hundred thirty-one million, two hundred twenty thousand, three hundred twenty-three".