101121281 has 2 divisors, whose sum is σ = 101121282. Its totient is φ = 101121280.

The previous prime is 101121269. The next prime is 101121311. The reversal of 101121281 is 182121101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100320256 + 801025 = 10016^2 + 895^2 .

It is a cyclic number.

It is not a de Polignac number, because 101121281 - 2¹⁴ = 101104897 is a prime.

It is a super-2 number, since 2×101121281² = 20451026942161922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (101127281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50560640 + 50560641.

It is an arithmetic number, because the mean of its divisors is an integer number (50560641).

Almost surely, 2^101121281 is an apocalyptic number.

It is an amenable number.

101121281 is a deficient number, since it is larger than the sum of its proper divisors (1).

101121281 is an equidigital number, since it uses as much as digits as its factorization.

101121281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

The square root of 101121281 is about 10055.9077660846. The cubic root of 101121281 is about 465.8872810930.

Adding to 101121281 its reverse (182121101), we get a palindrome (283242382).

The spelling of 101121281 in words is "one hundred one million, one hundred twenty-one thousand, two hundred eighty-one".