201021242 has 8 divisors (see below), whose sum is σ = 314642016. Its totient is φ = 96140572.

The previous prime is 201021241. The next prime is 201021251. The reversal of 201021242 is 242120102.

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

It is not an unprimeable number, because it can be changed into a prime (201021241) 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, 2184968 + ... + 2185059.

It is an arithmetic number, because the mean of its divisors is an integer number (39330252).

Almost surely, 2^201021242 is an apocalyptic number.

201021242 is a deficient number, since it is larger than the sum of its proper divisors (113620774).

201021242 is a wasteful number, since it uses less digits than its factorization.

201021242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370052.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 201021242 is about 14178.1960065447. The cubic root of 201021242 is about 585.7972348061.

Adding to 201021242 its reverse (242120102), we get a palindrome (443141344).

The spelling of 201021242 in words is "two hundred one million, twenty-one thousand, two hundred forty-two".