11151112405 has 4 divisors (see below), whose sum is σ = 13381334892. Its totient is φ = 8920889920.

The previous prime is 11151112387. The next prime is 11151112409. The reversal of 11151112405 is 50421115111.

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 1954877796 + 9196234609 = 44214^2 + 95897^2 .

It is not a de Polignac number, because 11151112405 - 2⁵ = 11151112373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11151112409) 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, 1115111236 + ... + 1115111245.

It is an arithmetic number, because the mean of its divisors is an integer number (3345333723).

Almost surely, 2^11151112405 is an apocalyptic number.

It is an amenable number.

11151112405 is a deficient number, since it is larger than the sum of its proper divisors (2230222487).

11151112405 is an equidigital number, since it uses as much as digits as its factorization.

11151112405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230222486.

The product of its (nonzero) digits is 200, while the sum is 22.

Adding to 11151112405 its reverse (50421115111), we get a palindrome (61572227516).

The spelling of 11151112405 in words is "eleven billion, one hundred fifty-one million, one hundred twelve thousand, four hundred five".