4171421684221 has 16 divisors (see below), whose sum is σ = 4554782668800. Its totient is φ = 3788751559600.

The previous prime is 4171421684219. The next prime is 4171421684249. The reversal of 4171421684221 is 1224861241714.

It is a cyclic number.

It is not a de Polignac number, because 4171421684221 - 2¹ = 4171421684219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4171421684251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222834900 + ... + 222853618.

It is an arithmetic number, because the mean of its divisors is an integer number (284673916800).

Almost surely, 2^{4171421684221} is an apocalyptic number.

It is an amenable number.

4171421684221 is a deficient number, since it is larger than the sum of its proper divisors (383360984579).

4171421684221 is a wasteful number, since it uses less digits than its factorization.

4171421684221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36080.

The product of its digits is 172032, while the sum is 43.

The spelling of 4171421684221 in words is "four trillion, one hundred seventy-one billion, four hundred twenty-one million, six hundred eighty-four thousand, two hundred twenty-one".