1111111323012 has 18 divisors (see below), whose sum is σ = 2808642511038. Its totient is φ = 370370440992.

The previous prime is 1111111322983. The next prime is 1111111323017. The reversal of 1111111323012 is 2103231111111.

It can be written as a sum of positive squares in only one way, i.e., 770912096256 + 340199226756 = 878016^2 + 583266^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1111111323017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15432101673 + ... + 15432101744.

Almost surely, 2^{1111111323012} is an apocalyptic number.

1111111323012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1111111323012 is an abundant number, since it is smaller than the sum of its proper divisors (1697531188026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111111323012 is a wasteful number, since it uses less digits than its factorization.

1111111323012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30864203427 (or 30864203422 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 1111111323012 its reverse (2103231111111), we get a palindrome (3214342434123).

The spelling of 1111111323012 in words is "one trillion, one hundred eleven billion, one hundred eleven million, three hundred twenty-three thousand, twelve".