1321313123241 has 16 divisors (see below), whose sum is σ = 2010406355200. Its totient is φ = 857067971184.

The previous prime is 1321313123201. The next prime is 1321313123261. The reversal of 1321313123241 is 1423213131231.

1321313123241 is a `hidden beast` number, since 1 + 3 + 21 + 3 + 1 + 312 + 324 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1321313123241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321313123201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 661316881 + ... + 661318878.

It is an arithmetic number, because the mean of its divisors is an integer number (125650397200).

Almost surely, 2^{1321313123241} is an apocalyptic number.

It is an amenable number.

1321313123241 is a deficient number, since it is larger than the sum of its proper divisors (689093231959).

1321313123241 is a wasteful number, since it uses less digits than its factorization.

1321313123241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322635805 (or 1322635799 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 1321313123241 its reverse (1423213131231), we get a palindrome (2744526254472).

The spelling of 1321313123241 in words is "one trillion, three hundred twenty-one billion, three hundred thirteen million, one hundred twenty-three thousand, two hundred forty-one".