1113431313131 has 4 divisors (see below), whose sum is σ = 1113486369264. Its totient is φ = 1113376257000.

The previous prime is 1113431313109. The next prime is 1113431313151. The reversal of 1113431313131 is 1313131343111.

It is a happy number.

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 1113431313131 - 2¹⁰ = 1113431312107 is a prime.

It is a super-2 number, since 2×1113431313131² (a number of 25 digits) contains 22 as substring.

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 1113431313131.

It is not an unprimeable number, because it can be changed into a prime (1113431313101) 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, 27497720 + ... + 27538181.

It is an arithmetic number, because the mean of its divisors is an integer number (278371592316).

Almost surely, 2^{1113431313131} is an apocalyptic number.

1113431313131 is a deficient number, since it is larger than the sum of its proper divisors (55056133).

1113431313131 is an equidigital number, since it uses as much as digits as its factorization.

1113431313131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55056132.

The product of its digits is 972, while the sum is 26.

Adding to 1113431313131 its reverse (1313131343111), we get a palindrome (2426562656242).

The spelling of 1113431313131 in words is "one trillion, one hundred thirteen billion, four hundred thirty-one million, three hundred thirteen thousand, one hundred thirty-one".