201466021 has 4 divisors (see below), whose sum is σ = 201666700. Its totient is φ = 201265344.

The previous prime is 201466019. The next prime is 201466033. The reversal of 201466021 is 120664102.

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 96628900 + 104837121 = 9830^2 + 10239^2 .

It is a cyclic number.

It is not a de Polignac number, because 201466021 - 2¹ = 201466019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201465983 and 201466001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201466081) 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, 98826 + ... + 100843.

It is an arithmetic number, because the mean of its divisors is an integer number (50416675).

Almost surely, 2^201466021 is an apocalyptic number.

It is an amenable number.

201466021 is a deficient number, since it is larger than the sum of its proper divisors (200679).

201466021 is a wasteful number, since it uses less digits than its factorization.

201466021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200678.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 201466021 is about 14193.8726568897. The cubic root of 201466021 is about 586.2289609548.

The spelling of 201466021 in words is "two hundred one million, four hundred sixty-six thousand, twenty-one".