242002021 has 16 divisors (see below), whose sum is σ = 270635904. Its totient is φ = 215209984.

The previous prime is 242002003. The next prime is 242002039. The reversal of 242002021 is 120200242.

242002021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (242002003) and next prime (242002039).

It is a cyclic number.

It is not a de Polignac number, because 242002021 - 2¹⁵ = 241969253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242001992 and 242002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242002001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28725 + ... + 36181.

It is an arithmetic number, because the mean of its divisors is an integer number (16914744).

Almost surely, 2^242002021 is an apocalyptic number.

It is an amenable number.

242002021 is a deficient number, since it is larger than the sum of its proper divisors (28633883).

242002021 is a wasteful number, since it uses less digits than its factorization.

242002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7580.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 242002021 is about 15556.4141433686. The cubic root of 242002021 is about 623.1697031738.

Adding to 242002021 its reverse (120200242), we get a palindrome (362202263).

The spelling of 242002021 in words is "two hundred forty-two million, two thousand, twenty-one".