128102000981 has 2 divisors, whose sum is σ = 128102000982. Its totient is φ = 128102000980.

The previous prime is 128102000969. The next prime is 128102000989. The reversal of 128102000981 is 189000201821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94377984100 + 33724016881 = 307210^2 + 183641^2 .

It is an emirp because it is prime and its reverse (189000201821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128102000981 - 2¹⁴ = 128101984597 is a prime.

It is a super-2 number, since 2×128102000981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128102000989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64051000490 + 64051000491.

It is an arithmetic number, because the mean of its divisors is an integer number (64051000491).

Almost surely, 2^128102000981 is an apocalyptic number.

It is an amenable number.

128102000981 is a deficient number, since it is larger than the sum of its proper divisors (1).

128102000981 is an equidigital number, since it uses as much as digits as its factorization.

128102000981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 32.

The spelling of 128102000981 in words is "one hundred twenty-eight billion, one hundred two million, nine hundred eighty-one", and thus it is an aban number.