201301021 has 4 divisors (see below), whose sum is σ = 206210844. Its totient is φ = 196391200.

The previous prime is 201301007. The next prime is 201301027. The reversal of 201301021 is 120103102.

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 47416996 + 153884025 = 6886^2 + 12405^2 .

It is a cyclic number.

It is not a de Polignac number, because 201301021 - 2⁹ = 201300509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201300989 and 201301007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201301027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2454850 + ... + 2454931.

It is an arithmetic number, because the mean of its divisors is an integer number (51552711).

Almost surely, 2^201301021 is an apocalyptic number.

It is an amenable number.

201301021 is a deficient number, since it is larger than the sum of its proper divisors (4909823).

201301021 is an equidigital number, since it uses as much as digits as its factorization.

201301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4909822.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 201301021 is about 14188.0590991157. The cubic root of 201301021 is about 586.0688773889.

Adding to 201301021 its reverse (120103102), we get a palindrome (321404123).

The spelling of 201301021 in words is "two hundred one million, three hundred one thousand, twenty-one".