1331422221 has 8 divisors (see below), whose sum is σ = 1782303264. Its totient is φ = 884078000.

The previous prime is 1331422217. The next prime is 1331422231. The reversal of 1331422221 is 1222241331.

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 1331422221 - 2² = 1331422217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331422231) 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, 883326 + ... + 884831.

It is an arithmetic number, because the mean of its divisors is an integer number (222787908).

Almost surely, 2^1331422221 is an apocalyptic number.

It is an amenable number.

1331422221 is a deficient number, since it is larger than the sum of its proper divisors (450881043).

1331422221 is a wasteful number, since it uses less digits than its factorization.

1331422221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768411.

The product of its digits is 576, while the sum is 21.

The square root of 1331422221 is about 36488.6587996873. The cubic root of 1331422221 is about 1100.1163020281.

Adding to 1331422221 its reverse (1222241331), we get a palindrome (2553663552).

The spelling of 1331422221 in words is "one billion, three hundred thirty-one million, four hundred twenty-two thousand, two hundred twenty-one".