13111431442 has 4 divisors (see below), whose sum is σ = 19667147166. Its totient is φ = 6555715720.

The previous prime is 13111431419. The next prime is 13111431457. The reversal of 13111431442 is 24413411131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24413411131 = 71 ⋅343850861.

It can be written as a sum of positive squares in only one way, i.e., 8351949321 + 4759482121 = 91389^2 + 68989^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3277857859 + ... + 3277857862.

Almost surely, 2^13111431442 is an apocalyptic number.

13111431442 is a deficient number, since it is larger than the sum of its proper divisors (6555715724).

13111431442 is an equidigital number, since it uses as much as digits as its factorization.

13111431442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6555715723.

The product of its digits is 1152, while the sum is 25.

Adding to 13111431442 its reverse (24413411131), we get a palindrome (37524842573).

The spelling of 13111431442 in words is "thirteen billion, one hundred eleven million, four hundred thirty-one thousand, four hundred forty-two".