1980607845121 has 2 divisors, whose sum is σ = 1980607845122. Its totient is φ = 1980607845120.

The previous prime is 1980607845089. The next prime is 1980607845143. The reversal of 1980607845121 is 1215487060891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1523410090225 + 457197754896 = 1234265^2 + 676164^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980607845121 - 2⁵ = 1980607845089 is a prime.

It is a super-3 number, since 3×1980607845121³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1980707845121) 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, 990303922560 + 990303922561.

It is an arithmetic number, because the mean of its divisors is an integer number (990303922561).

Almost surely, 2^{1980607845121} is an apocalyptic number.

It is an amenable number.

1980607845121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980607845121 is an equidigital number, since it uses as much as digits as its factorization.

1980607845121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 52.

The spelling of 1980607845121 in words is "one trillion, nine hundred eighty billion, six hundred seven million, eight hundred forty-five thousand, one hundred twenty-one".