101818201 has 4 divisors (see below), whose sum is σ = 102826404. Its totient is φ = 100810000.

The previous prime is 101818177. The next prime is 101818231. The reversal of 101818201 is 102818101.

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 52186176 + 49632025 = 7224^2 + 7045^2 .

It is a cyclic number.

It is not a de Polignac number, because 101818201 - 2¹¹ = 101816153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101818231) 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, 503950 + ... + 504151.

It is an arithmetic number, because the mean of its divisors is an integer number (25706601).

Almost surely, 2^101818201 is an apocalyptic number.

It is an amenable number.

101818201 is a deficient number, since it is larger than the sum of its proper divisors (1008203).

101818201 is a wasteful number, since it uses less digits than its factorization.

101818201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008202.

The product of its (nonzero) digits is 128, while the sum is 22.

The square root of 101818201 is about 10090.5005326792. The cubic root of 101818201 is about 466.9551179838.

Multiplying 101818201 by its sum of digits (22), we get a palindrome (2240000422).

The spelling of 101818201 in words is "one hundred one million, eight hundred eighteen thousand, two hundred one".