11021011020 has 36 divisors (see below), whose sum is σ = 33430400640. Its totient is φ = 2938936224.

The previous prime is 11021011019. The next prime is 11021011103. The reversal of 11021011020 is 2011012011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×11021011020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11021010993 and 11021011011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30613740 + ... + 30614099.

It is an arithmetic number, because the mean of its divisors is an integer number (928622240).

Almost surely, 2^11021011020 is an apocalyptic number.

11021011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11021011020 is an abundant number, since it is smaller than the sum of its proper divisors (22409389620).

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

11021011020 is a wasteful number, since it uses less digits than its factorization.

11021011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61227854 (or 61227849 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11021011020 its reverse (2011012011), we get a palindrome (13032023031).

Subtracting from 11021011020 its reverse (2011012011), we obtain a palindrome (9009999009).

The spelling of 11021011020 in words is "eleven billion, twenty-one million, eleven thousand, twenty".