11100320405 has 4 divisors (see below), whose sum is σ = 13320384492. Its totient is φ = 8880256320.

The previous prime is 11100320339. The next prime is 11100320419. The reversal of 11100320405 is 50402300111.

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 1682394289 + 9417926116 = 41017^2 + 97046^2 .

It is not a de Polignac number, because 11100320405 - 2¹⁸ = 11100058261 is a prime.

It is a super-2 number, since 2×11100320405² (a number of 21 digits) contains 22 as substring.

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, 1110032036 + ... + 1110032045.

It is an arithmetic number, because the mean of its divisors is an integer number (3330096123).

Almost surely, 2^11100320405 is an apocalyptic number.

It is an amenable number.

11100320405 is a deficient number, since it is larger than the sum of its proper divisors (2220064087).

11100320405 is an equidigital number, since it uses as much as digits as its factorization.

11100320405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220064086.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 11100320405 its reverse (50402300111), we get a palindrome (61502620516).

The spelling of 11100320405 in words is "eleven billion, one hundred million, three hundred twenty thousand, four hundred five".