242403304021 has 4 divisors (see below), whose sum is σ = 242413072972. Its totient is φ = 242393535072.

The previous prime is 242403303983. The next prime is 242403304081. The reversal of 242403304021 is 120403304242.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25047810225 + 217355493796 = 158265^2 + 466214^2 .

It is a cyclic number.

It is not a de Polignac number, because 242403304021 - 2¹⁹ = 242402779733 is a prime.

It is a super-3 number, since 3×242403304021³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242403304081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4847160 + ... + 4896913.

It is an arithmetic number, because the mean of its divisors is an integer number (60603268243).

Almost surely, 2^242403304021 is an apocalyptic number.

It is an amenable number.

242403304021 is a deficient number, since it is larger than the sum of its proper divisors (9768951).

242403304021 is an equidigital number, since it uses as much as digits as its factorization.

242403304021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9768950.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 242403304021 its reverse (120403304242), we get a palindrome (362806608263).

The spelling of 242403304021 in words is "two hundred forty-two billion, four hundred three million, three hundred four thousand, twenty-one".