11101112009978 has 4 divisors (see below), whose sum is σ = 16651668014970. Its totient is φ = 5550556004988.

The previous prime is 11101112009971. The next prime is 11101112010019. The reversal of 11101112009978 is 87990021110111.

11101112009978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8782883469649 + 2318228540329 = 2963593^2 + 1522573^2 .

It is not an unprimeable number, because it can be changed into a prime (11101112009971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775278002493 + ... + 2775278002496.

Almost surely, 2^{11101112009978} is an apocalyptic number.

11101112009978 is a deficient number, since it is larger than the sum of its proper divisors (5550556004992).

11101112009978 is an equidigital number, since it uses as much as digits as its factorization.

11101112009978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5550556004991.

The product of its (nonzero) digits is 9072, while the sum is 41.

The spelling of 11101112009978 in words is "eleven trillion, one hundred one billion, one hundred twelve million, nine thousand, nine hundred seventy-eight".