18201000020101 has 4 divisors (see below), whose sum is σ = 19158947389600. Its totient is φ = 17243052650604.

The previous prime is 18201000020059. The next prime is 18201000020113. The reversal of 18201000020101 is 10102000010281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18201000020101 - 2¹¹ = 18201000018053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18201000026101) 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 in 3 ways as a sum of consecutive naturals, for example, 478973684721 + ... + 478973684758.

It is an arithmetic number, because the mean of its divisors is an integer number (4789736847400).

Almost surely, 2^{18201000020101} is an apocalyptic number.

It is an amenable number.

18201000020101 is a deficient number, since it is larger than the sum of its proper divisors (957947369499).

18201000020101 is an equidigital number, since it uses as much as digits as its factorization.

18201000020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957947369498.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 18201000020101 its reverse (10102000010281), we get a palindrome (28303000030382).

The spelling of 18201000020101 in words is "eighteen trillion, two hundred one billion, twenty thousand, one hundred one".