111001101011028 has 36 divisors (see below), whose sum is σ = 280586607077140. Its totient is φ = 37000302304896.

The previous prime is 111001101011027. The next prime is 111001101011039. The reversal of 111001101011028 is 820110101100111.

It can be written as a sum of positive squares in 2 ways, for example, as 85928227983504 + 25072873027524 = 9269748^2 + 5007282^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 111001101011028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001101011027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21041226 + ... + 25782462.

Almost surely, 2^{111001101011028} is an apocalyptic number.

111001101011028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

111001101011028 is an abundant number, since it is smaller than the sum of its proper divisors (169585506066112).

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

111001101011028 is a wasteful number, since it uses less digits than its factorization.

111001101011028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5391576 (or 5391571 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 111001101011028 its reverse (820110101100111), we get a palindrome (931111202111139).

The spelling of 111001101011028 in words is "one hundred eleven trillion, one billion, one hundred one million, eleven thousand, twenty-eight".