201442021 has 8 divisors (see below), whose sum is σ = 222537600. Its totient is φ = 180810240.

The previous prime is 201442001. The next prime is 201442037. The reversal of 201442021 is 120244102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201442021 - 2¹³ = 201433829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201441986 and 201442004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201442001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115036 + ... + 116773.

It is an arithmetic number, because the mean of its divisors is an integer number (27817200).

Almost surely, 2^201442021 is an apocalyptic number.

It is an amenable number.

201442021 is a deficient number, since it is larger than the sum of its proper divisors (21095579).

201442021 is a wasteful number, since it uses less digits than its factorization.

201442021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231899.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 201442021 is about 14193.0271964793. The cubic root of 201442021 is about 586.2056815060.

Adding to 201442021 its reverse (120244102), we get a palindrome (321686123).

The spelling of 201442021 in words is "two hundred one million, four hundred forty-two thousand, twenty-one".