1203344011321 has 2 divisors, whose sum is σ = 1203344011322. Its totient is φ = 1203344011320.

The previous prime is 1203344011277. The next prime is 1203344011361. The reversal of 1203344011321 is 1231104433021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 761411562921 + 441932448400 = 872589^2 + 664780^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203344011321 - 2⁹ = 1203344010809 is a prime.

It is a super-2 number, since 2×1203344011321² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1203344011361) 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 as a sum of consecutive naturals, namely, 601672005660 + 601672005661.

It is an arithmetic number, because the mean of its divisors is an integer number (601672005661).

Almost surely, 2^{1203344011321} is an apocalyptic number.

It is an amenable number.

1203344011321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203344011321 is an equidigital number, since it uses as much as digits as its factorization.

1203344011321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1203344011321 its reverse (1231104433021), we get a palindrome (2434448444342).

The spelling of 1203344011321 in words is "one trillion, two hundred three billion, three hundred forty-four million, eleven thousand, three hundred twenty-one".