1331120221 has 8 divisors (see below), whose sum is σ = 1403780000. Its totient is φ = 1258720560.

The previous prime is 1331120207. The next prime is 1331120237. The reversal of 1331120221 is 1220211331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1331120221 - 2¹⁵ = 1331087453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331120195 and 1331120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331120201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54471 + ... + 75028.

It is an arithmetic number, because the mean of its divisors is an integer number (175472500).

Almost surely, 2^1331120221 is an apocalyptic number.

It is an amenable number.

1331120221 is a deficient number, since it is larger than the sum of its proper divisors (72659779).

1331120221 is a wasteful number, since it uses less digits than its factorization.

1331120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130059.

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

The square root of 1331120221 is about 36484.5202928584. The cubic root of 1331120221 is about 1100.0331177357.

Adding to 1331120221 its reverse (1220211331), we get a palindrome (2551331552).

The spelling of 1331120221 in words is "one billion, three hundred thirty-one million, one hundred twenty thousand, two hundred twenty-one".