1123123231312 has 40 divisors (see below), whose sum is σ = 2208629716776. Its totient is φ = 553173590016.

The previous prime is 1123123231303. The next prime is 1123123231339. The reversal of 1123123231312 is 2131323213211.

It can be written as a sum of positive squares in 4 ways, for example, as 32803005456 + 1090320225856 = 181116^2 + 1044184^2 .

It is a super-2 number, since 2×1123123231312² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327648 + ... + 1534144.

Almost surely, 2^{1123123231312} is an apocalyptic number.

It is an amenable number.

1123123231312 is a deficient number, since it is larger than the sum of its proper divisors (1085506485464).

1123123231312 is a wasteful number, since it uses less digits than its factorization.

1123123231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207375 (or 1207369 counting only the distinct ones).

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

Adding to 1123123231312 its reverse (2131323213211), we get a palindrome (3254446444523).

The spelling of 1123123231312 in words is "one trillion, one hundred twenty-three billion, one hundred twenty-three million, two hundred thirty-one thousand, three hundred twelve".