12102170942421 has 64 divisors (see below), whose sum is σ = 20728933416960. Its totient is φ = 6835498787520.

The previous prime is 12102170942419. The next prime is 12102170942431. The reversal of 12102170942421 is 12424907120121.

12102170942421 is a `hidden beast` number, since 1 + 2 + 10 + 217 + 0 + 9 + 4 + 2 + 421 = 666.

It is not a de Polignac number, because 12102170942421 - 2¹ = 12102170942419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102170942401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4599870 + ... + 6735216.

It is an arithmetic number, because the mean of its divisors is an integer number (323889584640).

Almost surely, 2^{12102170942421} is an apocalyptic number.

It is an amenable number.

12102170942421 is a deficient number, since it is larger than the sum of its proper divisors (8626762474539).

12102170942421 is a wasteful number, since it uses less digits than its factorization.

12102170942421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135711 (or 2135705 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 12102170942421 in words is "twelve trillion, one hundred two billion, one hundred seventy million, nine hundred forty-two thousand, four hundred twenty-one".