1111143355405 has 4 divisors (see below), whose sum is σ = 1333372026492. Its totient is φ = 888914684320.

The previous prime is 1111143355403. The next prime is 1111143355411. The reversal of 1111143355405 is 5045533411111.

It is a happy number.

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 247682396329 + 863460959076 = 497677^2 + 929226^2 .

It is not a de Polignac number, because 1111143355405 - 2¹ = 1111143355403 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 (1111143355403) 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, 111114335536 + ... + 111114335545.

It is an arithmetic number, because the mean of its divisors is an integer number (333343006623).

Almost surely, 2^{1111143355405} is an apocalyptic number.

It is an amenable number.

1111143355405 is a deficient number, since it is larger than the sum of its proper divisors (222228671087).

1111143355405 is an equidigital number, since it uses as much as digits as its factorization.

1111143355405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222228671086.

The product of its (nonzero) digits is 18000, while the sum is 34.

Adding to 1111143355405 its reverse (5045533411111), we get a palindrome (6156676766516).

The spelling of 1111143355405 in words is "one trillion, one hundred eleven billion, one hundred forty-three million, three hundred fifty-five thousand, four hundred five".