1313321201123 has 4 divisors (see below), whose sum is σ = 1315221811368. Its totient is φ = 1311420590880.

The previous prime is 1313321201111. The next prime is 1313321201141. The reversal of 1313321201123 is 3211021233131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1313321201123 - 2¹⁶ = 1313321135587 is a prime.

It is a super-2 number, since 2×1313321201123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313321201173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950304086 + ... + 950305467.

It is an arithmetic number, because the mean of its divisors is an integer number (328805452842).

Almost surely, 2^{1313321201123} is an apocalyptic number.

1313321201123 is a deficient number, since it is larger than the sum of its proper divisors (1900610245).

1313321201123 is an equidigital number, since it uses as much as digits as its factorization.

1313321201123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900610244.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1313321201123 its reverse (3211021233131), we get a palindrome (4524342434254).

The spelling of 1313321201123 in words is "one trillion, three hundred thirteen billion, three hundred twenty-one million, two hundred one thousand, one hundred twenty-three".