1120201021 has 4 divisors (see below), whose sum is σ = 1123780252. Its totient is φ = 1116621792.

The previous prime is 1120201013. The next prime is 1120201091. The reversal of 1120201021 is 1201020211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3705625 + 1116495396 = 1925^2 + 33414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1120201021 - 2³ = 1120201013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1120200989 and 1120201007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120201091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1789146 + ... + 1789771.

It is an arithmetic number, because the mean of its divisors is an integer number (280945063).

Almost surely, 2^1120201021 is an apocalyptic number.

It is an amenable number.

1120201021 is a deficient number, since it is larger than the sum of its proper divisors (3579231).

1120201021 is an equidigital number, since it uses as much as digits as its factorization.

1120201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579230.

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

The square root of 1120201021 is about 33469.4042522421. The cubic root of 1120201021 is about 1038.5609476271.

Adding to 1120201021 its reverse (1201020211), we get a palindrome (2321221232).

The spelling of 1120201021 in words is "one billion, one hundred twenty million, two hundred one thousand, twenty-one".