1131331123 has 6 divisors (see below), whose sum is σ = 1225051044. Its totient is φ = 1044305496.

The previous prime is 1131331099. The next prime is 1131331133. The reversal of 1131331123 is 3211331311.

It is not a de Polignac number, because 1131331123 - 2²⁹ = 594460211 is a prime.

It is a super-2 number, since 2×1131331123² = 2559820219736882258, which 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 1131331123.

It is not an unprimeable number, because it can be changed into a prime (1131331133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3346965 + ... + 3347302.

It is an arithmetic number, because the mean of its divisors is an integer number (204175174).

Almost surely, 2^1131331123 is an apocalyptic number.

1131331123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1131331123 is a deficient number, since it is larger than the sum of its proper divisors (93719921).

1131331123 is an equidigital number, since it uses as much as digits as its factorization.

1131331123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6694293 (or 6694280 counting only the distinct ones).

The product of its digits is 162, while the sum is 19.

The square root of 1131331123 is about 33635.2660610854. The cubic root of 1131331123 is about 1041.9892655125.

Adding to 1131331123 its reverse (3211331311), we get a palindrome (4342662434).

It can be divided in two parts, 11313 and 31123, that added together give a square (42436 = 206²).

The spelling of 1131331123 in words is "one billion, one hundred thirty-one million, three hundred thirty-one thousand, one hundred twenty-three".