12157225017065 has 4 divisors (see below), whose sum is σ = 14588670020484. Its totient is φ = 9725780013648.

The previous prime is 12157225017059. The next prime is 12157225017101. The reversal of 12157225017065 is 56071052275121.

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 5804143454041 + 6353081563024 = 2409179^2 + 2520532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12157225017065 is a prime.

It is a Duffinian number.

It is a Curzon 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, 1215722501702 + ... + 1215722501711.

It is an arithmetic number, because the mean of its divisors is an integer number (3647167505121).

Almost surely, 2^{12157225017065} is an apocalyptic number.

It is an amenable number.

12157225017065 is a deficient number, since it is larger than the sum of its proper divisors (2431445003419).

12157225017065 is an equidigital number, since it uses as much as digits as its factorization.

12157225017065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431445003418.

The product of its (nonzero) digits is 294000, while the sum is 44.

The spelling of 12157225017065 in words is "twelve trillion, one hundred fifty-seven billion, two hundred twenty-five million, seventeen thousand, sixty-five".