11119021812 has 18 divisors (see below), whose sum is σ = 28106416338. Its totient is φ = 3706340592.

The previous prime is 11119021807. The next prime is 11119021817. The reversal of 11119021812 is 21812091111.

It is an interprime number because it is at equal distance from previous prime (11119021807) and next prime (11119021817).

It can be written as a sum of positive squares in only one way, i.e., 10800613476 + 318408336 = 103926^2 + 17844^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11119021817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154430823 + ... + 154430894.

Almost surely, 2^11119021812 is an apocalyptic number.

11119021812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11119021812 is an abundant number, since it is smaller than the sum of its proper divisors (16987394526).

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

11119021812 is a wasteful number, since it uses less digits than its factorization.

11119021812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308861727 (or 308861722 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 27.

The spelling of 11119021812 in words is "eleven billion, one hundred nineteen million, twenty-one thousand, eight hundred twelve".