11020021012 has 144 divisors (see below), whose sum is σ = 26440102080. Its totient is φ = 3950553600.

The previous prime is 11020020953. The next prime is 11020021031. The reversal of 11020021012 is 21012002011.

It is a self number, because there is not a number n which added to its sum of digits gives 11020021012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15947587 + ... + 15948277.

It is an arithmetic number, because the mean of its divisors is an integer number (183611820).

Almost surely, 2^11020021012 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 11020021012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13220051040).

11020021012 is an abundant number, since it is smaller than the sum of its proper divisors (15420081068).

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

11020021012 is a wasteful number, since it uses less digits than its factorization.

11020021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 1293 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 11020021012 its reverse (21012002011), we get a palindrome (32032023023).

The spelling of 11020021012 in words is "eleven billion, twenty million, twenty-one thousand, twelve".