11323213505 has 4 divisors (see below), whose sum is σ = 13587856212. Its totient is φ = 9058570800.

The previous prime is 11323213501. The next prime is 11323213541. The reversal of 11323213505 is 50531232311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8832804289 + 2490409216 = 93983^2 + 49904^2 .

It is not a de Polignac number, because 11323213505 - 2² = 11323213501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11323213501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1132321346 + ... + 1132321355.

It is an arithmetic number, because the mean of its divisors is an integer number (3396964053).

Almost surely, 2^11323213505 is an apocalyptic number.

It is an amenable number.

11323213505 is a deficient number, since it is larger than the sum of its proper divisors (2264642707).

11323213505 is an equidigital number, since it uses as much as digits as its factorization.

11323213505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2264642706.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 11323213505 its reverse (50531232311), we get a palindrome (61854445816).

The spelling of 11323213505 in words is "eleven billion, three hundred twenty-three million, two hundred thirteen thousand, five hundred five".