1131242331031 has 4 divisors (see below), whose sum is σ = 1131261940600. Its totient is φ = 1131222721464.

The previous prime is 1131242330929. The next prime is 1131242331077. The reversal of 1131242331031 is 1301332421311.

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 1131242331031 - 2¹³ = 1131242322839 is a prime.

It is a super-2 number, since 2×1131242331031² (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 = 1131242330987 and 1131242331005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131242331091) 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, 9717996 + ... + 9833713.

It is an arithmetic number, because the mean of its divisors is an integer number (282815485150).

Almost surely, 2^{1131242331031} is an apocalyptic number.

1131242331031 is a deficient number, since it is larger than the sum of its proper divisors (19609569).

1131242331031 is an equidigital number, since it uses as much as digits as its factorization.

1131242331031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19609568.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 1131242331031 its reverse (1301332421311), we get a palindrome (2432574752342).

The spelling of 1131242331031 in words is "one trillion, one hundred thirty-one billion, two hundred forty-two million, three hundred thirty-one thousand, thirty-one".