101209206281 has 2 divisors, whose sum is σ = 101209206282. Its totient is φ = 101209206280.

The previous prime is 101209206227. The next prime is 101209206349. The reversal of 101209206281 is 182602902101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93831942400 + 7377263881 = 306320^2 + 85891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101209206281 is a prime.

It is a super-2 number, since 2×101209206281² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (101209206221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50604603140 + 50604603141.

It is an arithmetic number, because the mean of its divisors is an integer number (50604603141).

Almost surely, 2^101209206281 is an apocalyptic number.

It is an amenable number.

101209206281 is a deficient number, since it is larger than the sum of its proper divisors (1).

101209206281 is an equidigital number, since it uses as much as digits as its factorization.

101209206281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The spelling of 101209206281 in words is "one hundred one billion, two hundred nine million, two hundred six thousand, two hundred eighty-one".