1231040504165 has 8 divisors (see below), whose sum is σ = 1491590825088. Its totient is φ = 975270923280.

The previous prime is 1231040504137. The next prime is 1231040504171. The reversal of 1231040504165 is 5614050401321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231040504165 - 2¹⁶ = 1231040438629 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 1195184441 + ... + 1195185470.

It is an arithmetic number, because the mean of its divisors is an integer number (186448853136).

Almost surely, 2^{1231040504165} is an apocalyptic number.

It is an amenable number.

1231040504165 is a deficient number, since it is larger than the sum of its proper divisors (260550320923).

1231040504165 is a wasteful number, since it uses less digits than its factorization.

1231040504165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390370019.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 1231040504165 its reverse (5614050401321), we get a palindrome (6845090905486).

The spelling of 1231040504165 in words is "one trillion, two hundred thirty-one billion, forty million, five hundred four thousand, one hundred sixty-five".