1331229999 has 16 divisors (see below), whose sum is σ = 2050237440. Its totient is φ = 759346560.

The previous prime is 1331229997. The next prime is 1331230009. The reversal of 1331229999 is 9999221331.

It is not a de Polignac number, because 1331229999 - 2¹ = 1331229997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331229997) 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 in 15 ways as a sum of consecutive naturals, for example, 1185919 + ... + 1187040.

It is an arithmetic number, because the mean of its divisors is an integer number (128139840).

Almost surely, 2^1331229999 is an apocalyptic number.

1331229999 is a deficient number, since it is larger than the sum of its proper divisors (719007441).

1331229999 is a wasteful number, since it uses less digits than its factorization.

1331229999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372990.

The product of its digits is 236196, while the sum is 48.

The square root of 1331229999 is about 36486.0247080989. The cubic root of 1331229999 is about 1100.0633569568.

The spelling of 1331229999 in words is "one billion, three hundred thirty-one million, two hundred twenty-nine thousand, nine hundred ninety-nine".