171172112126 has 4 divisors (see below), whose sum is σ = 256758168192. Its totient is φ = 85586056062.

The previous prime is 171172112123. The next prime is 171172112161. The reversal of 171172112126 is 621211271171.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 171172112092 and 171172112101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171172112123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42793028030 + ... + 42793028033.

It is an arithmetic number, because the mean of its divisors is an integer number (64189542048).

Almost surely, 2^171172112126 is an apocalyptic number.

171172112126 is a deficient number, since it is larger than the sum of its proper divisors (85586056066).

171172112126 is an equidigital number, since it uses as much as digits as its factorization.

171172112126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85586056065.

The product of its digits is 2352, while the sum is 32.

Adding to 171172112126 its reverse (621211271171), we get a palindrome (792383383297).

The spelling of 171172112126 in words is "one hundred seventy-one billion, one hundred seventy-two million, one hundred twelve thousand, one hundred twenty-six".