1311020201131 has 4 divisors (see below), whose sum is σ = 1324000599264. Its totient is φ = 1298039803000.

The previous prime is 1311020201093. The next prime is 1311020201173.

It is a happy number.

1311020201131 is nontrivially palindromic in base 10.

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 1311020201131 - 2⁷ = 1311020201003 is a prime.

It is a super-2 number, since 2×1311020201131² (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 (1311020271131) 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, 6490198915 + ... + 6490199116.

It is an arithmetic number, because the mean of its divisors is an integer number (331000149816).

Almost surely, 2^{1311020201131} is an apocalyptic number.

1311020201131 is a deficient number, since it is larger than the sum of its proper divisors (12980398133).

1311020201131 is a wasteful number, since it uses less digits than its factorization.

1311020201131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12980398132.

The product of its (nonzero) digits is 36, while the sum is 16.

It can be divided in two parts, 1311020 and 201131, that added together give a palindrome (1512151).

The spelling of 1311020201131 in words is "one trillion, three hundred eleven billion, twenty million, two hundred one thousand, one hundred thirty-one".