101121000209 has 2 divisors, whose sum is σ = 101121000210. Its totient is φ = 101121000208.

The previous prime is 101121000191. The next prime is 101121000217. The reversal of 101121000209 is 902000121101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85057972609 + 16063027600 = 291647^2 + 126740^2 .

It is a cyclic number.

It is not a de Polignac number, because 101121000209 - 2⁸ = 101120999953 is a prime.

It is not a weakly prime, because it can be changed into another prime (101121000269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50560500104 + 50560500105.

It is an arithmetic number, because the mean of its divisors is an integer number (50560500105).

Almost surely, 2^101121000209 is an apocalyptic number.

It is an amenable number.

101121000209 is a deficient number, since it is larger than the sum of its proper divisors (1).

101121000209 is an equidigital number, since it uses as much as digits as its factorization.

101121000209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 101121000209 in words is "one hundred one billion, one hundred twenty-one million, two hundred nine", and thus it is an aban number.