12173571421 has 8 divisors (see below), whose sum is σ = 13505349600. Its totient is φ = 10879308240.

The previous prime is 12173571419. The next prime is 12173571433. The reversal of 12173571421 is 12417537121.

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 12173571421 - 2¹ = 12173571419 is a prime.

It is a super-2 number, since 2×12173571421² (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 (12173571401) 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, 9378066 + ... + 9379363.

It is an arithmetic number, because the mean of its divisors is an integer number (1688168700).

Almost surely, 2^12173571421 is an apocalyptic number.

12173571421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12173571421 is a deficient number, since it is larger than the sum of its proper divisors (1331778179).

12173571421 is a wasteful number, since it uses less digits than its factorization.

12173571421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18757499.

The product of its digits is 11760, while the sum is 34.

The spelling of 12173571421 in words is "twelve billion, one hundred seventy-three million, five hundred seventy-one thousand, four hundred twenty-one".