11021220100 has 36 divisors (see below), whose sum is σ = 26090236368. Its totient is φ = 4007716000.

The previous prime is 11021219999. The next prime is 11021220121. The reversal of 11021220100 is 102212011.

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

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, 5008546 + ... + 5010745.

It is an arithmetic number, because the mean of its divisors is an integer number (724728788).

Almost surely, 2^11021220100 is an apocalyptic number.

11021220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11021220100 is an abundant number, since it is smaller than the sum of its proper divisors (15069016268).

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

11021220100 is a wasteful number, since it uses less digits than its factorization.

11021220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10019316 (or 10019309 counting only the distinct ones).

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

Adding to 11021220100 its reverse (102212011), we get a palindrome (11123432111).

The spelling of 11021220100 in words is "eleven billion, twenty-one million, two hundred twenty thousand, one hundred".