128205127097 has 2 divisors, whose sum is σ = 128205127098. Its totient is φ = 128205127096.

The previous prime is 128205127051. The next prime is 128205127109. The reversal of 128205127097 is 790721502821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125900070976 + 2305056121 = 354824^2 + 48011^2 .

It is a cyclic number.

It is not a de Polignac number, because 128205127097 - 2¹⁴ = 128205110713 is a prime.

It is a super-2 number, since 2×128205127097² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128205127027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64102563548 + 64102563549.

It is an arithmetic number, because the mean of its divisors is an integer number (64102563549).

Almost surely, 2^128205127097 is an apocalyptic number.

It is an amenable number.

128205127097 is a deficient number, since it is larger than the sum of its proper divisors (1).

128205127097 is an equidigital number, since it uses as much as digits as its factorization.

128205127097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 128205127097 in words is "one hundred twenty-eight billion, two hundred five million, one hundred twenty-seven thousand, ninety-seven".