1330221121 has 4 divisors (see below), whose sum is σ = 1330471044. Its totient is φ = 1329971200.

The previous prime is 1330221089. The next prime is 1330221127. The reversal of 1330221121 is 1211220331.

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 349278721 + 980942400 = 18689^2 + 31320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330221121 - 2⁵ = 1330221089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1330221095 and 1330221104.

It is not an unprimeable number, because it can be changed into a prime (1330221127) 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, 116800 + ... + 127681.

It is an arithmetic number, because the mean of its divisors is an integer number (332617761).

Almost surely, 2^1330221121 is an apocalyptic number.

It is an amenable number.

1330221121 is a deficient number, since it is larger than the sum of its proper divisors (249923).

1330221121 is an equidigital number, since it uses as much as digits as its factorization.

1330221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249922.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1330221121 is about 36472.1965475073. The cubic root of 1330221121 is about 1099.7853909150.

Adding to 1330221121 its reverse (1211220331), we get a palindrome (2541441452).

The spelling of 1330221121 in words is "one billion, three hundred thirty million, two hundred twenty-one thousand, one hundred twenty-one".