1331121232289 has 2 divisors, whose sum is σ = 1331121232290. Its totient is φ = 1331121232288.

The previous prime is 1331121232283. The next prime is 1331121232327. The reversal of 1331121232289 is 9822321211331.

It is a happy number.

It is an a-pointer prime, because the next prime (1331121232327) can be obtained adding 1331121232289 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1271499801664 + 59621430625 = 1127608^2 + 244175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331121232289 - 2²⁰ = 1331120183713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331121232283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665560616144 + 665560616145.

It is an arithmetic number, because the mean of its divisors is an integer number (665560616145).

Almost surely, 2^{1331121232289} is an apocalyptic number.

It is an amenable number.

1331121232289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331121232289 is an equidigital number, since it uses as much as digits as its factorization.

1331121232289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The spelling of 1331121232289 in words is "one trillion, three hundred thirty-one billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred eighty-nine".