1131331111031 has 4 divisors (see below), whose sum is σ = 1234179393864. Its totient is φ = 1028482828200.

The previous prime is 1131331110997. The next prime is 1131331111063. The reversal of 1131331111031 is 1301111331311.

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 1131331111031 - 2⁶ = 1131331110967 is a prime.

It is a super-2 number, since 2×1131331111031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131331110994 and 1131331111012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131331111081) 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, 51424141400 + ... + 51424141421.

It is an arithmetic number, because the mean of its divisors is an integer number (308544848466).

Almost surely, 2^{1131331111031} is an apocalyptic number.

1131331111031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131331111031 is a deficient number, since it is larger than the sum of its proper divisors (102848282833).

1131331111031 is a wasteful number, since it uses less digits than its factorization.

1131331111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102848282832.

The product of its (nonzero) digits is 81, while the sum is 20.

Adding to 1131331111031 its reverse (1301111331311), we get a palindrome (2432442442342).

The spelling of 1131331111031 in words is "one trillion, one hundred thirty-one billion, three hundred thirty-one million, one hundred eleven thousand, thirty-one".