10102018181 has 4 divisors (see below), whose sum is σ = 10102340364. Its totient is φ = 10101696000.

The previous prime is 10102018127. The next prime is 10102018189. The reversal of 10102018181 is 18181020101.

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 4166702500 + 5935315681 = 64550^2 + 77041^2 .

It is a cyclic number.

It is not a de Polignac number, because 10102018181 - 2²² = 10097823877 is a prime.

It is a super-2 number, since 2×10102018181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10102018189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108290 + ... + 178691.

It is an arithmetic number, because the mean of its divisors is an integer number (2525585091).

Almost surely, 2^10102018181 is an apocalyptic number.

It is an amenable number.

10102018181 is a deficient number, since it is larger than the sum of its proper divisors (322183).

10102018181 is an equidigital number, since it uses as much as digits as its factorization.

10102018181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322182.

The product of its (nonzero) digits is 128, while the sum is 23.

Adding to 10102018181 its reverse (18181020101), we get a palindrome (28283038282).

The spelling of 10102018181 in words is "ten billion, one hundred two million, eighteen thousand, one hundred eighty-one".