101240281 has 2 divisors, whose sum is σ = 101240282. Its totient is φ = 101240280.

The previous prime is 101240257. The next prime is 101240299. The reversal of 101240281 is 182042101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66912400 + 34327881 = 8180^2 + 5859^2 .

It is an emirp because it is prime and its reverse (182042101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101240281 - 2¹¹ = 101238233 is a prime.

It is a super-2 number, since 2×101240281² = 20499188993917922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101240201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50620140 + 50620141.

It is an arithmetic number, because the mean of its divisors is an integer number (50620141).

Almost surely, 2^101240281 is an apocalyptic number.

It is an amenable number.

101240281 is a deficient number, since it is larger than the sum of its proper divisors (1).

101240281 is an equidigital number, since it uses as much as digits as its factorization.

101240281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 101240281 is about 10061.8229461664. The cubic root of 101240281 is about 466.0699622343.

Adding to 101240281 its reverse (182042101), we get a palindrome (283282382).

The spelling of 101240281 in words is "one hundred one million, two hundred forty thousand, two hundred eighty-one".