1313020211131 has 4 divisors (see below), whose sum is σ = 1315530766552. Its totient is φ = 1310509655712.

The previous prime is 1313020211123. The next prime is 1313020211171. The reversal of 1313020211131 is 1311120203131.

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 1313020211131 - 2³ = 1313020211123 is a prime.

It is a super-2 number, since 2×1313020211131² (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 = 1313020211099 and 1313020211108.

It is not an unprimeable number, because it can be changed into a prime (1313020211101) 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, 1255276926 + ... + 1255277971.

It is an arithmetic number, because the mean of its divisors is an integer number (328882691638).

Almost surely, 2^{1313020211131} is an apocalyptic number.

1313020211131 is a deficient number, since it is larger than the sum of its proper divisors (2510555421).

1313020211131 is an equidigital number, since it uses as much as digits as its factorization.

1313020211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510555420.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1313020211131 its reverse (1311120203131), we get a palindrome (2624140414262).

The spelling of 1313020211131 in words is "one trillion, three hundred thirteen billion, twenty million, two hundred eleven thousand, one hundred thirty-one".