210101310109 has 2 divisors, whose sum is σ = 210101310110. Its totient is φ = 210101310108.

The previous prime is 210101310019. The next prime is 210101310131. The reversal of 210101310109 is 901013101012.

Together with previous prime (210101310019) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183179720025 + 26921590084 = 427995^2 + 164078^2 .

It is a cyclic number.

It is not a de Polignac number, because 210101310109 - 2¹¹ = 210101308061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210101311109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105050655054 + 105050655055.

It is an arithmetic number, because the mean of its divisors is an integer number (105050655055).

Almost surely, 2^210101310109 is an apocalyptic number.

It is an amenable number.

210101310109 is a deficient number, since it is larger than the sum of its proper divisors (1).

210101310109 is an equidigital number, since it uses as much as digits as its factorization.

210101310109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 19.

The spelling of 210101310109 in words is "two hundred ten billion, one hundred one million, three hundred ten thousand, one hundred nine".