11212013305 has 4 divisors (see below), whose sum is σ = 13454415972. Its totient is φ = 8969610640.

The previous prime is 11212013291. The next prime is 11212013339. The reversal of 11212013305 is 50331021211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50331021211 = 419 ⋅120121769.

It can be written as a sum of positive squares in 2 ways, for example, as 4260956176 + 6951057129 = 65276^2 + 83373^2 .

It is not a de Polignac number, because 11212013305 - 2⁹ = 11212012793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121201326 + ... + 1121201335.

It is an arithmetic number, because the mean of its divisors is an integer number (3363603993).

Almost surely, 2^11212013305 is an apocalyptic number.

It is an amenable number.

11212013305 is a deficient number, since it is larger than the sum of its proper divisors (2242402667).

11212013305 is an equidigital number, since it uses as much as digits as its factorization.

11212013305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242402666.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 11212013305 its reverse (50331021211), we get a palindrome (61543034516).

The spelling of 11212013305 in words is "eleven billion, two hundred twelve million, thirteen thousand, three hundred five".