11010221020 has 48 divisors (see below), whose sum is σ = 25271301888. Its totient is φ = 4011310080.

The previous prime is 11010221011. The next prime is 11010221069. The reversal of 11010221020 is 2012201011.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11010220988 and 11010221006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511767 + ... + 532846.

It is an arithmetic number, because the mean of its divisors is an integer number (526485456).

Almost surely, 2^11010221020 is an apocalyptic number.

11010221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11010221020 is an abundant number, since it is smaller than the sum of its proper divisors (14261080868).

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

11010221020 is a wasteful number, since it uses less digits than its factorization.

11010221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044670 (or 1044668 counting only the distinct ones).

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

Adding to 11010221020 its reverse (2012201011), we get a palindrome (13022422031).

The spelling of 11010221020 in words is "eleven billion, ten million, two hundred twenty-one thousand, twenty".