102111780851 has 2 divisors, whose sum is σ = 102111780852. Its totient is φ = 102111780850.

The previous prime is 102111780677. The next prime is 102111780871. The reversal of 102111780851 is 158087111201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102111780851 - 2³⁴ = 84931911667 is a prime.

It is not a weakly prime, because it can be changed into another prime (102111780871) 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, 51055890425 + 51055890426.

It is an arithmetic number, because the mean of its divisors is an integer number (51055890426).

Almost surely, 2^102111780851 is an apocalyptic number.

102111780851 is a deficient number, since it is larger than the sum of its proper divisors (1).

102111780851 is an equidigital number, since it uses as much as digits as its factorization.

102111780851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 35.

The spelling of 102111780851 in words is "one hundred two billion, one hundred eleven million, seven hundred eighty thousand, eight hundred fifty-one".