11111001101000 has 256 divisors, whose sum is σ = 27225525600000. Its totient is φ = 4238714726400.

The previous prime is 11111001100933. The next prime is 11111001101009. The reversal of 11111001101000 is 10110011111.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is not an unprimeable number, because it can be changed into a prime (11111001101009) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4178637671 + ... + 4178640329.

It is an arithmetic number, because the mean of its divisors is an integer number (106349709375).

Almost surely, 2^{11111001101000} is an apocalyptic number.

11111001101000 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 11111001101000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13612762800000).

11111001101000 is an abundant number, since it is smaller than the sum of its proper divisors (16114524499000).

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

11111001101000 is a wasteful number, since it uses less digits than its factorization.

11111001101000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4417 (or 4403 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 8.

Adding to 11111001101000 its reverse (10110011111), we get a palindrome (11121111112111).

The spelling of 11111001101000 in words is "eleven trillion, one hundred eleven billion, one million, one hundred one thousand".