1316542021321 has 8 divisors (see below), whose sum is σ = 1394185764384. Its totient is φ = 1238920511040.

The previous prime is 1316542021303. The next prime is 1316542021357. The reversal of 1316542021321 is 1231202456131.

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

It is not a de Polignac number, because 1316542021321 - 2²¹ = 1316539924169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1316542421321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5436195 + ... + 5673208.

It is an arithmetic number, because the mean of its divisors is an integer number (174273220548).

Almost surely, 2^{1316542021321} is an apocalyptic number.

It is an amenable number.

1316542021321 is a deficient number, since it is larger than the sum of its proper divisors (77643743063).

1316542021321 is a wasteful number, since it uses less digits than its factorization.

1316542021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11116391.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 1316542021321 its reverse (1231202456131), we get a palindrome (2547744477452).

The spelling of 1316542021321 in words is "one trillion, three hundred sixteen billion, five hundred forty-two million, twenty-one thousand, three hundred twenty-one".