980421959981 has 2 divisors, whose sum is σ = 980421959982. Its totient is φ = 980421959980.

The previous prime is 980421959941. The next prime is 980421960047. The reversal of 980421959981 is 189959124089.

980421959981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 971685319081 + 8736640900 = 985741^2 + 93470^2 .

It is a cyclic number.

It is not a de Polignac number, because 980421959981 - 2¹⁴ = 980421943597 is a prime.

It is a super-2 number, since 2×980421959981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (980421959921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490210979990 + 490210979991.

It is an arithmetic number, because the mean of its divisors is an integer number (490210979991).

Almost surely, 2^980421959981 is an apocalyptic number.

It is an amenable number.

980421959981 is a deficient number, since it is larger than the sum of its proper divisors (1).

980421959981 is an equidigital number, since it uses as much as digits as its factorization.

980421959981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16796160, while the sum is 65.

The spelling of 980421959981 in words is "nine hundred eighty billion, four hundred twenty-one million, nine hundred fifty-nine thousand, nine hundred eighty-one".