242000505421 has 2 divisors, whose sum is σ = 242000505422. Its totient is φ = 242000505420.

The previous prime is 242000505413. The next prime is 242000505451. The reversal of 242000505421 is 124505000242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240144102025 + 1856403396 = 490045^2 + 43086^2 .

It is a cyclic number.

It is not a de Polignac number, because 242000505421 - 2³ = 242000505413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242000505451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121000252710 + 121000252711.

It is an arithmetic number, because the mean of its divisors is an integer number (121000252711).

Almost surely, 2^242000505421 is an apocalyptic number.

It is an amenable number.

242000505421 is a deficient number, since it is larger than the sum of its proper divisors (1).

242000505421 is an equidigital number, since it uses as much as digits as its factorization.

242000505421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 242000505421 its reverse (124505000242), we get a palindrome (366505505663).

The spelling of 242000505421 in words is "two hundred forty-two billion, five hundred five thousand, four hundred twenty-one".