1313023201131 has 4 divisors (see below), whose sum is σ = 1750697601512. Its totient is φ = 875348800752.

The previous prime is 1313023201121. The next prime is 1313023201153. The reversal of 1313023201131 is 1311023203131.

It is a happy number.

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

It is not a de Polignac number, because 1313023201131 - 2¹⁰ = 1313023200107 is a prime.

It is a super-2 number, since 2×1313023201131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313023201098 and 1313023201107.

It is not an unprimeable number, because it can be changed into a prime (1313023201121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218837200186 + ... + 218837200191.

It is an arithmetic number, because the mean of its divisors is an integer number (437674400378).

Almost surely, 2^{1313023201131} is an apocalyptic number.

1313023201131 is a deficient number, since it is larger than the sum of its proper divisors (437674400381).

1313023201131 is an equidigital number, since it uses as much as digits as its factorization.

1313023201131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437674400380.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1313023201131 its reverse (1311023203131), we get a palindrome (2624046404262).

The spelling of 1313023201131 in words is "one trillion, three hundred thirteen billion, twenty-three million, two hundred one thousand, one hundred thirty-one".