11115401043611 has 4 divisors (see below), whose sum is σ = 11498690734800. Its totient is φ = 10732111352424.

The previous prime is 11115401043581. The next prime is 11115401043631. The reversal of 11115401043611 is 11634010451111.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-11115401043611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 383289691159 = 11115401043611 / (1 + 1 + 1 + 1 + 5 + 4 + 0 + 1 + 0 + 4 + 3 + 6 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11115401043631) 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, 191644845551 + ... + 191644845608.

It is an arithmetic number, because the mean of its divisors is an integer number (2874672683700).

Almost surely, 2^{11115401043611} is an apocalyptic number.

11115401043611 is a deficient number, since it is larger than the sum of its proper divisors (383289691189).

11115401043611 is an equidigital number, since it uses as much as digits as its factorization.

11115401043611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383289691188.

The product of its (nonzero) digits is 1440, while the sum is 29.

Adding to 11115401043611 its reverse (11634010451111), we get a palindrome (22749411494722).

The spelling of 11115401043611 in words is "eleven trillion, one hundred fifteen billion, four hundred one million, forty-three thousand, six hundred eleven".