101000001209 has 2 divisors, whose sum is σ = 101000001210. Its totient is φ = 101000001208.

The previous prime is 101000001199. The next prime is 101000001217. The reversal of 101000001209 is 902100000101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100998746809 + 1254400 = 317803^2 + 1120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101000001209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101000001193 and 101000001202.

It is not a weakly prime, because it can be changed into another prime (101000006209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50500000604 + 50500000605.

It is an arithmetic number, because the mean of its divisors is an integer number (50500000605).

Almost surely, 2^101000001209 is an apocalyptic number.

It is an amenable number.

101000001209 is a deficient number, since it is larger than the sum of its proper divisors (1).

101000001209 is an equidigital number, since it uses as much as digits as its factorization.

101000001209 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 101000001209 in words is "one hundred one billion, one thousand, two hundred nine".