102101200109 has 2 divisors, whose sum is σ = 102101200110. Its totient is φ = 102101200108.

The previous prime is 102101200079. The next prime is 102101200141. The reversal of 102101200109 is 901002101201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59254270084 + 42846930025 = 243422^2 + 206995^2 .

It is a cyclic number.

It is not a de Polignac number, because 102101200109 - 2⁸ = 102101199853 is a prime.

It is a super-2 number, since 2×102101200109² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102101200009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51050600054 + 51050600055.

It is an arithmetic number, because the mean of its divisors is an integer number (51050600055).

Almost surely, 2^102101200109 is an apocalyptic number.

It is an amenable number.

102101200109 is a deficient number, since it is larger than the sum of its proper divisors (1).

102101200109 is an equidigital number, since it uses as much as digits as its factorization.

102101200109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 102101200109 in words is "one hundred two billion, one hundred one million, two hundred thousand, one hundred nine".