100112281 has 2 divisors, whose sum is σ = 100112282. Its totient is φ = 100112280.

The previous prime is 100112267. The next prime is 100112297. The reversal of 100112281 is 182211001.

It is an a-pointer prime, because the next prime (100112297) can be obtained adding 100112281 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63920025 + 36192256 = 7995^2 + 6016^2 .

It is a cyclic number.

It is not a de Polignac number, because 100112281 - 2⁷ = 100112153 is a prime.

It is a super-2 number, since 2×100112281² = 20044937614045922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100112231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50056140 + 50056141.

It is an arithmetic number, because the mean of its divisors is an integer number (50056141).

Almost surely, 2^100112281 is an apocalyptic number.

It is an amenable number.

100112281 is a deficient number, since it is larger than the sum of its proper divisors (1).

100112281 is an equidigital number, since it uses as much as digits as its factorization.

100112281 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 16.

The square root of 100112281 is about 10005.6124750062. The cubic root of 100112281 is about 464.3325391286.

Adding to 100112281 its reverse (182211001), we get a palindrome (282323282).

The spelling of 100112281 in words is "one hundred million, one hundred twelve thousand, two hundred eighty-one".