11101021220 has 24 divisors (see below), whose sum is σ = 23490105408. Its totient is φ = 4406511200.

The previous prime is 11101021213. The next prime is 11101021241. The reversal of 11101021220 is 2212010111.

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 7 ways as a sum of consecutive naturals, for example, 2115896 + ... + 2121135.

It is an arithmetic number, because the mean of its divisors is an integer number (978754392).

Almost surely, 2^11101021220 is an apocalyptic number.

11101021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11101021220 is an abundant number, since it is smaller than the sum of its proper divisors (12389084188).

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

11101021220 is a wasteful number, since it uses less digits than its factorization.

11101021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4237171 (or 4237169 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11101021220 its reverse (2212010111), we get a palindrome (13313031331).

The spelling of 11101021220 in words is "eleven billion, one hundred one million, twenty-one thousand, two hundred twenty".