11020211988 has 48 divisors (see below), whose sum is σ = 27289503360. Its totient is φ = 3449309184.

The previous prime is 11020211953. The next prime is 11020211989. The reversal of 11020211988 is 88911202011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020211989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25953 + ... + 150711.

It is an arithmetic number, because the mean of its divisors is an integer number (568531320).

Almost surely, 2^11020211988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11020211988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13644751680).

11020211988 is an abundant number, since it is smaller than the sum of its proper divisors (16269291372).

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

11020211988 is a wasteful number, since it uses less digits than its factorization.

11020211988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125216 (or 125214 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 33.

Adding to 11020211988 its reverse (88911202011), we get a palindrome (99931413999).

The spelling of 11020211988 in words is "eleven billion, twenty million, two hundred eleven thousand, nine hundred eighty-eight".