1321198271 has 8 divisors (see below), whose sum is σ = 1344032784. Its totient is φ = 1298555200.

The previous prime is 1321198253. The next prime is 1321198279. The reversal of 1321198271 is 1728911231.

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 1321198271 - 2¹⁰ = 1321197247 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 (1321198279) 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, 33905 + ... + 61578.

It is an arithmetic number, because the mean of its divisors is an integer number (168004098).

Almost surely, 2^1321198271 is an apocalyptic number.

1321198271 is a deficient number, since it is larger than the sum of its proper divisors (22834513).

1321198271 is a wasteful number, since it uses less digits than its factorization.

1321198271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95721.

The product of its digits is 6048, while the sum is 35.

The square root of 1321198271 is about 36348.2911702875. The cubic root of 1321198271 is about 1097.2931436634.

The spelling of 1321198271 in words is "one billion, three hundred twenty-one million, one hundred ninety-eight thousand, two hundred seventy-one".