1131345821173 has 4 divisors (see below), whose sum is σ = 1132422269248. Its totient is φ = 1130269373100.

The previous prime is 1131345821171. The next prime is 1131345821189. The reversal of 1131345821173 is 3711285431311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1131345821173 - 2¹ = 1131345821171 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 (1131345821171) 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, 538222461 + ... + 538224562.

It is an arithmetic number, because the mean of its divisors is an integer number (283105567312).

Almost surely, 2^{1131345821173} is an apocalyptic number.

It is an amenable number.

1131345821173 is a deficient number, since it is larger than the sum of its proper divisors (1076448075).

1131345821173 is a wasteful number, since it uses less digits than its factorization.

1131345821173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076448074.

The product of its digits is 60480, while the sum is 40.

The spelling of 1131345821173 in words is "one trillion, one hundred thirty-one billion, three hundred forty-five million, eight hundred twenty-one thousand, one hundred seventy-three".