11431131213 has 8 divisors (see below), whose sum is σ = 15529084128. Its totient is φ = 7476966224.

The previous prime is 11431131197. The next prime is 11431131227. The reversal of 11431131213 is 31213113411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11431131213 - 2⁴ = 11431131197 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11431131213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431131913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35946795 + ... + 35947112.

It is an arithmetic number, because the mean of its divisors is an integer number (1941135516).

Almost surely, 2^11431131213 is an apocalyptic number.

It is an amenable number.

11431131213 is a deficient number, since it is larger than the sum of its proper divisors (4097952915).

11431131213 is an equidigital number, since it uses as much as digits as its factorization.

11431131213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71893963.

The product of its digits is 216, while the sum is 21.

Adding to 11431131213 its reverse (31213113411), we get a palindrome (42644244624).

The spelling of 11431131213 in words is "eleven billion, four hundred thirty-one million, one hundred thirty-one thousand, two hundred thirteen".