12170061157 has 4 divisors (see below), whose sum is σ = 12376333440. Its totient is φ = 11963788876.

The previous prime is 12170061121. The next prime is 12170061173. The reversal of 12170061157 is 75116007121.

It is a happy number.

12170061157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12170061157 - 2²⁷ = 12035843429 is a prime.

It is a super-2 number, since 2×12170061157² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12170061107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103136053 + ... + 103136170.

It is an arithmetic number, because the mean of its divisors is an integer number (3094083360).

Almost surely, 2^12170061157 is an apocalyptic number.

It is an amenable number.

12170061157 is a deficient number, since it is larger than the sum of its proper divisors (206272283).

12170061157 is an equidigital number, since it uses as much as digits as its factorization.

12170061157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206272282.

The product of its (nonzero) digits is 2940, while the sum is 31.

Adding to 12170061157 its reverse (75116007121), we get a palindrome (87286068278).

The spelling of 12170061157 in words is "twelve billion, one hundred seventy million, sixty-one thousand, one hundred fifty-seven".