1123223231131 has 4 divisors (see below), whose sum is σ = 1123254979000. Its totient is φ = 1123191483264.

The previous prime is 1123223231087. The next prime is 1123223231159. The reversal of 1123223231131 is 1311323223211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123223231131 is a prime.

It is a super-2 number, since 2×1123223231131² (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 = 1123223231096 and 1123223231105.

It is not an unprimeable number, because it can be changed into a prime (1123223231161) 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, 15820806 + ... + 15891643.

It is an arithmetic number, because the mean of its divisors is an integer number (280813744750).

Almost surely, 2^{1123223231131} is an apocalyptic number.

1123223231131 is a deficient number, since it is larger than the sum of its proper divisors (31747869).

1123223231131 is an equidigital number, since it uses as much as digits as its factorization.

1123223231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31747868.

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

Adding to 1123223231131 its reverse (1311323223211), we get a palindrome (2434546454342).

The spelling of 1123223231131 in words is "one trillion, one hundred twenty-three billion, two hundred twenty-three million, two hundred thirty-one thousand, one hundred thirty-one".