131211111133 has 4 divisors (see below), whose sum is σ = 131234311260. Its totient is φ = 131187911008.

The previous prime is 131211111079. The next prime is 131211111151. The reversal of 131211111133 is 331111112131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37095915609 + 94115195524 = 192603^2 + 306782^2 .

It is a cyclic number.

It is not a de Polignac number, because 131211111133 - 2²⁵ = 131177556701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131211111133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211111833) 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, 11591578 + ... + 11602891.

It is an arithmetic number, because the mean of its divisors is an integer number (32808577815).

Almost surely, 2^131211111133 is an apocalyptic number.

It is an amenable number.

131211111133 is a deficient number, since it is larger than the sum of its proper divisors (23200127).

131211111133 is an equidigital number, since it uses as much as digits as its factorization.

131211111133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23200126.

The product of its digits is 54, while the sum is 19.

Adding to 131211111133 its reverse (331111112131), we get a palindrome (462322223264).

The spelling of 131211111133 in words is "one hundred thirty-one billion, two hundred eleven million, one hundred eleven thousand, one hundred thirty-three".