11101211988 has 48 divisors (see below), whose sum is σ = 26564927424. Its totient is φ = 3606024960.

The previous prime is 11101211987. The next prime is 11101212019. The reversal of 11101211988 is 88911210111.

It is a happy number.

11101211988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101211987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433806 + ... + 458682.

It is an arithmetic number, because the mean of its divisors is an integer number (553435988).

Almost surely, 2^11101211988 is an apocalyptic number.

It is an amenable number.

11101211988 is an abundant number, since it is smaller than the sum of its proper divisors (15463715436).

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

11101211988 is a wasteful number, since it uses less digits than its factorization.

11101211988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25832 (or 25830 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 33.

The spelling of 11101211988 in words is "eleven billion, one hundred one million, two hundred eleven thousand, nine hundred eighty-eight".