11212316405 has 4 divisors (see below), whose sum is σ = 13454779692. Its totient is φ = 8969853120.

The previous prime is 11212316393. The next prime is 11212316411. The reversal of 11212316405 is 50461321211.

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 2802325969 + 8409990436 = 52937^2 + 91706^2 .

It is not a de Polignac number, because 11212316405 - 2⁴ = 11212316389 is a prime.

It is a Duffinian number.

It is a congruent 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, 1121231636 + ... + 1121231645.

It is an arithmetic number, because the mean of its divisors is an integer number (3363694923).

Almost surely, 2^11212316405 is an apocalyptic number.

It is an amenable number.

11212316405 is a deficient number, since it is larger than the sum of its proper divisors (2242463287).

11212316405 is an equidigital number, since it uses as much as digits as its factorization.

11212316405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242463286.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 11212316405 its reverse (50461321211), we get a palindrome (61673637616).

The spelling of 11212316405 in words is "eleven billion, two hundred twelve million, three hundred sixteen thousand, four hundred five".