201150442021 has 4 divisors (see below), whose sum is σ = 206586940492. Its totient is φ = 195713943552.

The previous prime is 201150441941. The next prime is 201150442043. The reversal of 201150442021 is 120244051102.

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 116810150625 + 84340291396 = 341775^2 + 290414^2 .

It is a cyclic number.

It is not a de Polignac number, because 201150442021 - 2⁷ = 201150441893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201150441983 and 201150442001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201150442421) 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, 2718249180 + ... + 2718249253.

It is an arithmetic number, because the mean of its divisors is an integer number (51646735123).

Almost surely, 2^201150442021 is an apocalyptic number.

It is an amenable number.

201150442021 is a deficient number, since it is larger than the sum of its proper divisors (5436498471).

201150442021 is an equidigital number, since it uses as much as digits as its factorization.

201150442021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5436498470.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 201150442021 its reverse (120244051102), we get a palindrome (321394493123).

The spelling of 201150442021 in words is "two hundred one billion, one hundred fifty million, four hundred forty-two thousand, twenty-one".