11021002520 has 128 divisors (see below), whose sum is σ = 27357445440. Its totient is φ = 3962634240.

The previous prime is 11021002513. The next prime is 11021002523. The reversal of 11021002520 is 2520012011.

It is a junction number, because it is equal to n+sod(n) for n = 11021002495 and 11021002504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021002523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19786082 + ... + 19786638.

Almost surely, 2^11021002520 is an apocalyptic number.

11021002520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11021002520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13678722720).

11021002520 is an abundant number, since it is smaller than the sum of its proper divisors (16336442920).

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

11021002520 is a wasteful number, since it uses less digits than its factorization.

11021002520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 11021002520 its reverse (2520012011), we get a palindrome (13541014531).

The spelling of 11021002520 in words is "eleven billion, twenty-one million, two thousand, five hundred twenty".