102128856877 has 2 divisors, whose sum is σ = 102128856878. Its totient is φ = 102128856876.

The previous prime is 102128856871. The next prime is 102128856881. The reversal of 102128856877 is 778658821201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52639960356 + 49488896521 = 229434^2 + 222461^2 .

It is a cyclic number.

It is not a de Polignac number, because 102128856877 - 2⁷ = 102128856749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102128856871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51064428438 + 51064428439.

It is an arithmetic number, because the mean of its divisors is an integer number (51064428439).

Almost surely, 2^102128856877 is an apocalyptic number.

It is an amenable number.

102128856877 is a deficient number, since it is larger than the sum of its proper divisors (1).

102128856877 is an equidigital number, since it uses as much as digits as its factorization.

102128856877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3010560, while the sum is 55.

The spelling of 102128856877 in words is "one hundred two billion, one hundred twenty-eight million, eight hundred fifty-six thousand, eight hundred seventy-seven".