242420420421 has 48 divisors (see below), whose sum is σ = 364146706560. Its totient is φ = 155285475840.

The previous prime is 242420420419. The next prime is 242420420423. The reversal of 242420420421 is 124024024242.

It is an interprime number because it is at equal distance from previous prime (242420420419) and next prime (242420420423).

It is not a de Polignac number, because 242420420421 - 2¹ = 242420420419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242420420423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19577010 + ... + 19589388.

It is an arithmetic number, because the mean of its divisors is an integer number (7586389720).

Almost surely, 2^242420420421 is an apocalyptic number.

It is an amenable number.

242420420421 is a deficient number, since it is larger than the sum of its proper divisors (121726286139).

242420420421 is a wasteful number, since it uses less digits than its factorization.

242420420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13226 (or 13223 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 242420420421 its reverse (124024024242), we get a palindrome (366444444663).

The spelling of 242420420421 in words is "two hundred forty-two billion, four hundred twenty million, four hundred twenty thousand, four hundred twenty-one".