13111333431 has 32 divisors (see below), whose sum is σ = 20616657408. Its totient is φ = 7255059840.

The previous prime is 13111333429. The next prime is 13111333441. The reversal of 13111333431 is 13433311131.

It is not a de Polignac number, because 13111333431 - 2¹ = 13111333429 is a prime.

It is a super-2 number, since 2×13111333431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111333421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123961 + ... + 203933.

It is an arithmetic number, because the mean of its divisors is an integer number (644270544).

Almost surely, 2^13111333431 is an apocalyptic number.

13111333431 is a deficient number, since it is larger than the sum of its proper divisors (7505323977).

13111333431 is a wasteful number, since it uses less digits than its factorization.

13111333431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80231.

The product of its digits is 972, while the sum is 24.

Adding to 13111333431 its reverse (13433311131), we get a palindrome (26544644562).

The spelling of 13111333431 in words is "thirteen billion, one hundred eleven million, three hundred thirty-three thousand, four hundred thirty-one".