242221404021 has 8 divisors (see below), whose sum is σ = 331690571424. Its totient is φ = 157116586320.

The previous prime is 242221403939. The next prime is 242221404059. The reversal of 242221404021 is 120404122242.

It is a happy number.

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

It is not a de Polignac number, because 242221404021 - 2⁹ = 242221403509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242221403982 and 242221404000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242221404721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091087295 + ... + 1091087516.

It is an arithmetic number, because the mean of its divisors is an integer number (41461321428).

Almost surely, 2^242221404021 is an apocalyptic number.

It is an amenable number.

242221404021 is a deficient number, since it is larger than the sum of its proper divisors (89469167403).

242221404021 is a wasteful number, since it uses less digits than its factorization.

242221404021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182174851.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 242221404021 its reverse (120404122242), we get a palindrome (362625526263).

The spelling of 242221404021 in words is "two hundred forty-two billion, two hundred twenty-one million, four hundred four thousand, twenty-one".