1084811221405 has 4 divisors (see below), whose sum is σ = 1301773465692. Its totient is φ = 867848977120.

The previous prime is 1084811221367. The next prime is 1084811221441. The reversal of 1084811221405 is 5041221184801.

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 344641791844 + 740169429561 = 587062^2 + 860331^2 .

It is not a de Polignac number, because 1084811221405 - 2²⁹ = 1084274350493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108481122136 + ... + 108481122145.

It is an arithmetic number, because the mean of its divisors is an integer number (325443366423).

Almost surely, 2^{1084811221405} is an apocalyptic number.

It is an amenable number.

1084811221405 is a deficient number, since it is larger than the sum of its proper divisors (216962244287).

1084811221405 is an equidigital number, since it uses as much as digits as its factorization.

1084811221405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216962244286.

The product of its (nonzero) digits is 20480, while the sum is 37.

The spelling of 1084811221405 in words is "one trillion, eighty-four billion, eight hundred eleven million, two hundred twenty-one thousand, four hundred five".