102120999947 has 2 divisors, whose sum is σ = 102120999948. Its totient is φ = 102120999946.

The previous prime is 102120999917. The next prime is 102120999961. The reversal of 102120999947 is 749999021201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102120999947 - 2⁸ = 102120999691 is a prime.

It is not a weakly prime, because it can be changed into another prime (102120999917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060499973 + 51060499974.

It is an arithmetic number, because the mean of its divisors is an integer number (51060499974).

Almost surely, 2^102120999947 is an apocalyptic number.

102120999947 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120999947 is an equidigital number, since it uses as much as digits as its factorization.

102120999947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 53.

The spelling of 102120999947 in words is "one hundred two billion, one hundred twenty million, nine hundred ninety-nine thousand, nine hundred forty-seven".