1321901317 has 12 divisors (see below), whose sum is σ = 1531895616. Its totient is φ = 1131035840.

The previous prime is 1321901297. The next prime is 1321901327. The reversal of 1321901317 is 7131091231.

It is not a de Polignac number, because 1321901317 - 2²⁷ = 1187683589 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 (1321901327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204733 + ... + 211090.

It is an arithmetic number, because the mean of its divisors is an integer number (127657968).

Almost surely, 2^1321901317 is an apocalyptic number.

1321901317 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1321901317 is a deficient number, since it is larger than the sum of its proper divisors (209994299).

1321901317 is a wasteful number, since it uses less digits than its factorization.

1321901317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415868 (or 415851 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 1321901317 is about 36357.9608476603. The cubic root of 1321901317 is about 1097.4877424547.

Adding to 1321901317 its reverse (7131091231), we get a palindrome (8452992548).

The spelling of 1321901317 in words is "one billion, three hundred twenty-one million, nine hundred one thousand, three hundred seventeen".