1243111133321 has 8 divisors (see below), whose sum is σ = 1361622742920. Its totient is φ = 1129642571008.

The previous prime is 1243111133317. The next prime is 1243111133359. The reversal of 1243111133321 is 1233311113421.

It can be written as a sum of positive squares in 4 ways, for example, as 52315125625 + 1190796007696 = 228725^2 + 1091236^2 .

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 1243111133321 - 2² = 1243111133317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243111133821) 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 7 ways as a sum of consecutive naturals, for example, 1260761306 + ... + 1260762291.

It is an arithmetic number, because the mean of its divisors is an integer number (170202842865).

Almost surely, 2^{1243111133321} is an apocalyptic number.

It is an amenable number.

1243111133321 is a deficient number, since it is larger than the sum of its proper divisors (118511609599).

1243111133321 is a wasteful number, since it uses less digits than its factorization.

1243111133321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521523643.

The product of its digits is 1296, while the sum is 26.

Adding to 1243111133321 its reverse (1233311113421), we get a palindrome (2476422246742).

The spelling of 1243111133321 in words is "one trillion, two hundred forty-three billion, one hundred eleven million, one hundred thirty-three thousand, three hundred twenty-one".