1311100213231 has 4 divisors (see below), whose sum is σ = 1368104570352. Its totient is φ = 1254095856112.

The previous prime is 1311100213229. The next prime is 1311100213253. The reversal of 1311100213231 is 1323120011131.

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 1311100213231 - 2¹ = 1311100213229 is a prime.

It is a super-2 number, since 2×1311100213231² (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 = 1311100213199 and 1311100213208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311100213271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28502178526 + ... + 28502178571.

It is an arithmetic number, because the mean of its divisors is an integer number (342026142588).

Almost surely, 2^{1311100213231} is an apocalyptic number.

1311100213231 is a deficient number, since it is larger than the sum of its proper divisors (57004357121).

1311100213231 is an equidigital number, since it uses as much as digits as its factorization.

1311100213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57004357120.

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

Adding to 1311100213231 its reverse (1323120011131), we get a palindrome (2634220224362).

The spelling of 1311100213231 in words is "one trillion, three hundred eleven billion, one hundred million, two hundred thirteen thousand, two hundred thirty-one".