1321501117 has 2 divisors, whose sum is σ = 1321501118. Its totient is φ = 1321501116.

The previous prime is 1321501081. The next prime is 1321501121. The reversal of 1321501117 is 7111051231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1104498756 + 217002361 = 33234^2 + 14731^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321501117 - 2⁷ = 1321500989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321501127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660750558 + 660750559.

It is an arithmetic number, because the mean of its divisors is an integer number (660750559).

Almost surely, 2^1321501117 is an apocalyptic number.

It is an amenable number.

1321501117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321501117 is an equidigital number, since it uses as much as digits as its factorization.

1321501117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210, while the sum is 22.

The square root of 1321501117 is about 36352.4568220636. The cubic root of 1321501117 is about 1097.3769780278.

Adding to 1321501117 its reverse (7111051231), we get a palindrome (8432552348).

The spelling of 1321501117 in words is "one billion, three hundred twenty-one million, five hundred one thousand, one hundred seventeen".