1120545221 has 4 divisors (see below), whose sum is σ = 1120617792. Its totient is φ = 1120472652.

The previous prime is 1120545193. The next prime is 1120545227. The reversal of 1120545221 is 1225450211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1225450211 = 683 ⋅1794217.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1120545221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120545227) 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 3 ways as a sum of consecutive naturals, for example, 2861 + ... + 47426.

It is an arithmetic number, because the mean of its divisors is an integer number (280154448).

Almost surely, 2^1120545221 is an apocalyptic number.

It is an amenable number.

1120545221 is a deficient number, since it is larger than the sum of its proper divisors (72571).

1120545221 is an equidigital number, since it uses as much as digits as its factorization.

1120545221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72570.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1120545221 is about 33474.5458669718. The cubic root of 1120545221 is about 1038.6673083203.

Adding to 1120545221 its reverse (1225450211), we get a palindrome (2345995432).

The spelling of 1120545221 in words is "one billion, one hundred twenty million, five hundred forty-five thousand, two hundred twenty-one".