101010020009 has 2 divisors, whose sum is σ = 101010020010. Its totient is φ = 101010020008.

The previous prime is 101010019997. The next prime is 101010020051. The reversal of 101010020009 is 900020010101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85541625625 + 15468394384 = 292475^2 + 124372^2 .

It is a cyclic number.

It is not a de Polignac number, because 101010020009 - 2⁸ = 101010019753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101010019975 and 101010020002.

It is not a weakly prime, because it can be changed into another prime (101010020099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50505010004 + 50505010005.

It is an arithmetic number, because the mean of its divisors is an integer number (50505010005).

Almost surely, 2^101010020009 is an apocalyptic number.

It is an amenable number.

101010020009 is a deficient number, since it is larger than the sum of its proper divisors (1).

101010020009 is an equidigital number, since it uses as much as digits as its factorization.

101010020009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 14.

The spelling of 101010020009 in words is "one hundred one billion, ten million, twenty thousand, nine".