10100081 has 4 divisors (see below), whose sum is σ = 10118772. Its totient is φ = 10081392.

The previous prime is 10100047. The next prime is 10100089. The reversal of 10100081 is 18000101.

10100081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2310400 + 7789681 = 1520^2 + 2791^2 .

It is a cyclic number.

It is not a de Polignac number, because 10100081 - 2¹⁰ = 10099057 is a prime.

It is a super-2 number, since 2×10100081² = 204023272413122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10100089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8510 + ... + 9623.

It is an arithmetic number, because the mean of its divisors is an integer number (2529693).

Almost surely, 2^10100081 is an apocalyptic number.

It is an amenable number.

10100081 is a deficient number, since it is larger than the sum of its proper divisors (18691).

10100081 is an equidigital number, since it uses as much as digits as its factorization.

10100081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18690.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 10100081 is about 3178.0624600533. The cubic root of 10100081 is about 216.1598111444.

Adding to 10100081 its reverse (18000101), we get a palindrome (28100182).

The spelling of 10100081 in words is "ten million, one hundred thousand, eighty-one".