102120117912949 has 2 divisors, whose sum is σ = 102120117912950. Its totient is φ = 102120117912948.

The previous prime is 102120117912941. The next prime is 102120117913039. The reversal of 102120117912949 is 949219711021201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101238008124100 + 882109788849 = 10061710^2 + 939207^2 .

It is a cyclic number.

It is not a de Polignac number, because 102120117912949 - 2³ = 102120117912941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102120117912941) 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, 51060058956474 + 51060058956475.

It is an arithmetic number, because the mean of its divisors is an integer number (51060058956475).

Almost surely, 2^{102120117912949} is an apocalyptic number.

It is an amenable number.

102120117912949 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120117912949 is an equidigital number, since it uses as much as digits as its factorization.

102120117912949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 49.

The spelling of 102120117912949 in words is "one hundred two trillion, one hundred twenty billion, one hundred seventeen million, nine hundred twelve thousand, nine hundred forty-nine".