1331447121 has 9 divisors (see below), whose sum is σ = 1923359529. Its totient is φ = 887558436.

The previous prime is 1331447083. The next prime is 1331447147. The reversal of 1331447121 is 1217441331.

The square root of 1331447121 is 36489.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1331447121 - 2¹⁵ = 1331414353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1331447171) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 103386 + ... + 115548.

Almost surely, 2^1331447121 is an apocalyptic number.

1331447121 is the 36489-th square number.

1331447121 is the 18245-th centered octagonal number.

It is an amenable number.

1331447121 is a deficient number, since it is larger than the sum of its proper divisors (591912408).

1331447121 is an frugal number, since it uses more digits than its factorization.

1331447121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24332 (or 12166 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The cubic root of 1331447121 is about 1100.1231600392.

Adding to 1331447121 its reverse (1217441331), we get a palindrome (2548888452).

The spelling of 1331447121 in words is "one billion, three hundred thirty-one million, four hundred forty-seven thousand, one hundred twenty-one".