1321442201243 has 8 divisors (see below), whose sum is σ = 1341927797760. Its totient is φ = 1300979033640.

The previous prime is 1321442201201. The next prime is 1321442201263. The reversal of 1321442201243 is 3421022441231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321442201243 - 2¹⁸ = 1321441939099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321442201263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5488463 + ... + 5724168.

It is an arithmetic number, because the mean of its divisors is an integer number (167740974720).

Almost surely, 2^{1321442201243} is an apocalyptic number.

1321442201243 is a deficient number, since it is larger than the sum of its proper divisors (20485596517).

1321442201243 is a wasteful number, since it uses less digits than its factorization.

1321442201243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11214457.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 1321442201243 its reverse (3421022441231), we get a palindrome (4742464642474).

The spelling of 1321442201243 in words is "one trillion, three hundred twenty-one billion, four hundred forty-two million, two hundred one thousand, two hundred forty-three".