1221084080171 has 8 divisors (see below), whose sum is σ = 1230319366464. Its totient is φ = 1211853464640.

The previous prime is 1221084080149. The next prime is 1221084080207. The reversal of 1221084080171 is 1710804801221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221084080171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221084080101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641960 + ... + 1689461.

It is an arithmetic number, because the mean of its divisors is an integer number (153789920808).

Almost surely, 2^{1221084080171} is an apocalyptic number.

1221084080171 is a deficient number, since it is larger than the sum of its proper divisors (9235286293).

1221084080171 is a wasteful number, since it uses less digits than its factorization.

1221084080171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335381.

The product of its (nonzero) digits is 7168, while the sum is 35.

Adding to 1221084080171 its reverse (1710804801221), we get a palindrome (2931888881392).

The spelling of 1221084080171 in words is "one trillion, two hundred twenty-one billion, eighty-four million, eighty thousand, one hundred seventy-one".