1111211100000 has 432 divisors, whose sum is σ = 3960891174240. Its totient is φ = 295488000000.

The previous prime is 1111211099983. The next prime is 1111211100113. The reversal of 1111211100000 is 11121111.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 360898461 + ... + 360901539.

It is an arithmetic number, because the mean of its divisors is an integer number (9168729570).

Almost surely, 2^{1111211100000} is an apocalyptic number.

1111211100000 is a gapful number since it is divisible by the number (10) 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 1111211100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1980445587120).

1111211100000 is an abundant number, since it is smaller than the sum of its proper divisors (2849680074240).

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

1111211100000 is an equidigital number, since it uses as much as digits as its factorization.

1111211100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521 (or 3490 counting only the distinct ones).

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

Adding to 1111211100000 its reverse (11121111), we get a palindrome (1111222221111).

It can be divided in two parts, 111121 and 1100000, that added together give a palindrome (1211121).

The spelling of 1111211100000 in words is "one trillion, one hundred eleven billion, two hundred eleven million, one hundred thousand".