1120021101 has 20 divisors (see below), whose sum is σ = 1761179200. Its totient is φ = 707380776.

The previous prime is 1120021099. The next prime is 1120021171. The reversal of 1120021101 is 1011200211.

It is a happy number.

It is not a de Polignac number, because 1120021101 - 2¹ = 1120021099 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120021171) 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 19 ways as a sum of consecutive naturals, for example, 362341 + ... + 365418.

It is an arithmetic number, because the mean of its divisors is an integer number (88058960).

Almost surely, 2^1120021101 is an apocalyptic number.

It is an amenable number.

1120021101 is a deficient number, since it is larger than the sum of its proper divisors (641158099).

1120021101 is an equidigital number, since it uses as much as digits as its factorization.

1120021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727790 (or 727781 counting only the distinct ones).

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

The square root of 1120021101 is about 33466.7163163642. The cubic root of 1120021101 is about 1038.5053421637.

Adding to 1120021101 its reverse (1011200211), we get a palindrome (2131221312).

The spelling of 1120021101 in words is "one billion, one hundred twenty million, twenty-one thousand, one hundred one".