1213179709805 has 16 divisors (see below), whose sum is σ = 1663872760704. Its totient is φ = 831852936000.

The previous prime is 1213179709799. The next prime is 1213179709877. The reversal of 1213179709805 is 5089079713121.

It is a happy number.

It is not a de Polignac number, because 1213179709805 - 2¹⁴ = 1213179693421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153071 + ... + 1565180.

It is an arithmetic number, because the mean of its divisors is an integer number (103992047544).

Almost surely, 2^{1213179709805} is an apocalyptic number.

It is an amenable number.

1213179709805 is a deficient number, since it is larger than the sum of its proper divisors (450693050899).

1213179709805 is a wasteful number, since it uses less digits than its factorization.

1213179709805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738436.

The product of its (nonzero) digits is 952560, while the sum is 53.

The spelling of 1213179709805 in words is "one trillion, two hundred thirteen billion, one hundred seventy-nine million, seven hundred nine thousand, eight hundred five".