210102100193809 has 2 divisors, whose sum is σ = 210102100193810. Its totient is φ = 210102100193808.

The previous prime is 210102100193803. The next prime is 210102100193827. The reversal of 210102100193809 is 908391001201012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186654424595409 + 23447675598400 = 13662153^2 + 4842280^2 .

It is a cyclic number.

It is not a de Polignac number, because 210102100193809 - 2⁴⁷ = 69364611838481 is a prime.

It is not a weakly prime, because it can be changed into another prime (210102100193803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105051050096904 + 105051050096905.

It is an arithmetic number, because the mean of its divisors is an integer number (105051050096905).

Almost surely, 2^{210102100193809} is an apocalyptic number.

It is an amenable number.

210102100193809 is a deficient number, since it is larger than the sum of its proper divisors (1).

210102100193809 is an equidigital number, since it uses as much as digits as its factorization.

210102100193809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 210102100193809 in words is "two hundred ten trillion, one hundred two billion, one hundred million, one hundred ninety-three thousand, eight hundred nine".