1111001100012 has 72 divisors (see below), whose sum is σ = 2874824672720. Its totient is φ = 361576535040.

The previous prime is 1111001099987. The next prime is 1111001100017. The reversal of 1111001100012 is 2100011001111.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1111001099967 and 1111001100003.

It is not an unprimeable number, because it can be changed into a prime (1111001100017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3760164 + ... + 4044852.

Almost surely, 2^{1111001100012} is an apocalyptic number.

1111001100012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111001100012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437412336360).

1111001100012 is an abundant number, since it is smaller than the sum of its proper divisors (1763823572708).

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

1111001100012 is a wasteful number, since it uses less digits than its factorization.

1111001100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287263 (or 287258 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 1111001100012 its reverse (2100011001111), we get a palindrome (3211012101123).

The spelling of 1111001100012 in words is "one trillion, one hundred eleven billion, one million, one hundred thousand, twelve".