1241243320321 has 3 divisors (see below), whose sum is σ = 1241244434433. Its totient is φ = 1241242206210.

The previous prime is 1241243320283. The next prime is 1241243320349. The reversal of 1241243320321 is 1230233421421.

The square root of 1241243320321 is 1114111.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1241243320321 - 2³¹ = 1239095836673 is a prime.

It is a super-2 number, since 2×1241243320321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1241243320321.

It is not an unprimeable number, because it can be changed into a prime (1241243320351) 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 in 2 ways as a sum of consecutive naturals, for example, 557056 + ... + 1671166.

It is an arithmetic number, because the mean of its divisors is an integer number (413748144811).

Almost surely, 2^{1241243320321} is an apocalyptic number.

1241243320321 is the 1114111-st square number.

1241243320321 is the 557056-th centered octagonal number.

It is an amenable number.

1241243320321 is a deficient number, since it is larger than the sum of its proper divisors (1114112).

1241243320321 is an frugal number, since it uses more digits than its factorization.

1241243320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228222 (or 1114111 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1241243320321 its reverse (1230233421421), we get a palindrome (2471476741742).

The spelling of 1241243320321 in words is "one trillion, two hundred forty-one billion, two hundred forty-three million, three hundred twenty thousand, three hundred twenty-one".