1212202120489 has 2 divisors, whose sum is σ = 1212202120490. Its totient is φ = 1212202120488.

The previous prime is 1212202120487. The next prime is 1212202120499. The reversal of 1212202120489 is 9840212022121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693214434025 + 518987686464 = 832595^2 + 720408^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212202120489 - 2¹ = 1212202120487 is a prime.

Together with 1212202120487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1212202120487) 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, 606101060244 + 606101060245.

It is an arithmetic number, because the mean of its divisors is an integer number (606101060245).

Almost surely, 2^{1212202120489} is an apocalyptic number.

It is an amenable number.

1212202120489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212202120489 is an equidigital number, since it uses as much as digits as its factorization.

1212202120489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 1212202120489 in words is "one trillion, two hundred twelve billion, two hundred two million, one hundred twenty thousand, four hundred eighty-nine".