1011100220 has 24 divisors (see below), whose sum is σ = 2286642624. Its totient is φ = 373329216.

The previous prime is 1011100199. The next prime is 1011100229. The reversal of 1011100220 is 220011101.

It is a junction number, because it is equal to n+sod(n) for n = 1011100198 and 1011100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011100229) by changing a digit.

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, 1944164 + ... + 1944683.

It is an arithmetic number, because the mean of its divisors is an integer number (95276776).

Almost surely, 2^1011100220 is an apocalyptic number.

1011100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011100220 is an abundant number, since it is smaller than the sum of its proper divisors (1275542404).

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

1011100220 is a wasteful number, since it uses less digits than its factorization.

1011100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888869 (or 3888867 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1011100220 is about 31797.8021253042. The cubic root of 1011100220 is about 1003.6864665976.

Adding to 1011100220 its reverse (220011101), we get a palindrome (1231111321).

The spelling of 1011100220 in words is "one billion, eleven million, one hundred thousand, two hundred twenty".