1331229941 has 2 divisors, whose sum is σ = 1331229942. Its totient is φ = 1331229940.

The previous prime is 1331229937. The next prime is 1331229997. The reversal of 1331229941 is 1499221331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1259895025 + 71334916 = 35495^2 + 8446^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331229941 - 2² = 1331229937 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331223941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665614970 + 665614971.

It is an arithmetic number, because the mean of its divisors is an integer number (665614971).

Almost surely, 2^1331229941 is an apocalyptic number.

It is an amenable number.

1331229941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331229941 is an equidigital number, since it uses as much as digits as its factorization.

1331229941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The square root of 1331229941 is about 36486.0239132740. The cubic root of 1331229941 is about 1100.0633409807.

The spelling of 1331229941 in words is "one billion, three hundred thirty-one million, two hundred twenty-nine thousand, nine hundred forty-one".