101010109909 has 2 divisors, whose sum is σ = 101010109910. Its totient is φ = 101010109908.

The previous prime is 101010109903. The next prime is 101010110011. The reversal of 101010109909 is 909901010101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86525987409 + 14484122500 = 294153^2 + 120350^2 .

It is a cyclic number.

It is not a de Polignac number, because 101010109909 - 2¹⁵ = 101010077141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101010109903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50505054954 + 50505054955.

It is an arithmetic number, because the mean of its divisors is an integer number (50505054955).

Almost surely, 2^101010109909 is an apocalyptic number.

It is an amenable number.

101010109909 is a deficient number, since it is larger than the sum of its proper divisors (1).

101010109909 is an equidigital number, since it uses as much as digits as its factorization.

101010109909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 31.

The spelling of 101010109909 in words is "one hundred one billion, ten million, one hundred nine thousand, nine hundred nine".