671221201 has 8 divisors (see below), whose sum is σ = 769942784. Its totient is φ = 573207840.

The previous prime is 671221193. The next prime is 671221231. The reversal of 671221201 is 102122176.

It is a happy number.

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 671221201 - 2³ = 671221193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671221231) 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, 175020 + ... + 178813.

It is an arithmetic number, because the mean of its divisors is an integer number (96242848).

Almost surely, 2^671221201 is an apocalyptic number.

It is an amenable number.

671221201 is a deficient number, since it is larger than the sum of its proper divisors (98721583).

671221201 is a wasteful number, since it uses less digits than its factorization.

671221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354111.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 671221201 is about 25907.9370270965. The cubic root of 671221201 is about 875.5653276219.

Adding to 671221201 its reverse (102122176), we get a palindrome (773343377).

The spelling of 671221201 in words is "six hundred seventy-one million, two hundred twenty-one thousand, two hundred one".