12172217123 has 8 divisors (see below), whose sum is σ = 13496468016. Its totient is φ = 10884247200.

The previous prime is 12172217111. The next prime is 12172217129. The reversal of 12172217123 is 32171227121.

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

It is a cyclic number.

It is not a de Polignac number, because 12172217123 - 2²² = 12168022819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12172217129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9069536 + ... + 9070877.

It is an arithmetic number, because the mean of its divisors is an integer number (1687058502).

Almost surely, 2^12172217123 is an apocalyptic number.

12172217123 is a deficient number, since it is larger than the sum of its proper divisors (1324250893).

12172217123 is a wasteful number, since it uses less digits than its factorization.

12172217123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18140485.

The product of its digits is 2352, while the sum is 29.

The spelling of 12172217123 in words is "twelve billion, one hundred seventy-two million, two hundred seventeen thousand, one hundred twenty-three".