1326121001 has 2 divisors, whose sum is σ = 1326121002. Its totient is φ = 1326121000.

The previous prime is 1326120997. The next prime is 1326121079. The reversal of 1326121001 is 1001216231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1284505600 + 41615401 = 35840^2 + 6451^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326121001 - 2² = 1326120997 is a prime.

It is not a weakly prime, because it can be changed into another prime (1326121301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663060500 + 663060501.

It is an arithmetic number, because the mean of its divisors is an integer number (663060501).

Almost surely, 2^1326121001 is an apocalyptic number.

It is an amenable number.

1326121001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326121001 is an equidigital number, since it uses as much as digits as its factorization.

1326121001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1326121001 is about 36415.9443238810. The cubic root of 1326121001 is about 1098.6542774763.

Adding to 1326121001 its reverse (1001216231), we get a palindrome (2327337232).

The spelling of 1326121001 in words is "one billion, three hundred twenty-six million, one hundred twenty-one thousand, one".