331213221289 has 2 divisors, whose sum is σ = 331213221290. Its totient is φ = 331213221288.

The previous prime is 331213221281. The next prime is 331213221323. The reversal of 331213221289 is 982122312133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260186707225 + 71026514064 = 510085^2 + 266508^2 .

It is a cyclic number.

It is not a de Polignac number, because 331213221289 - 2³ = 331213221281 is a prime.

It is not a weakly prime, because it can be changed into another prime (331213221281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165606610644 + 165606610645.

It is an arithmetic number, because the mean of its divisors is an integer number (165606610645).

Almost surely, 2^331213221289 is an apocalyptic number.

It is an amenable number.

331213221289 is a deficient number, since it is larger than the sum of its proper divisors (1).

331213221289 is an equidigital number, since it uses as much as digits as its factorization.

331213221289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The spelling of 331213221289 in words is "three hundred thirty-one billion, two hundred thirteen million, two hundred twenty-one thousand, two hundred eighty-nine".