242600221 has 2 divisors, whose sum is σ = 242600222. Its totient is φ = 242600220.

The previous prime is 242600213. The next prime is 242600249. The reversal of 242600221 is 122006242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224580196 + 18020025 = 14986^2 + 4245^2 .

It is a cyclic number.

It is not a de Polignac number, because 242600221 - 2³ = 242600213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242600291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121300110 + 121300111.

It is an arithmetic number, because the mean of its divisors is an integer number (121300111).

Almost surely, 2^242600221 is an apocalyptic number.

It is an amenable number.

242600221 is a deficient number, since it is larger than the sum of its proper divisors (1).

242600221 is an equidigital number, since it uses as much as digits as its factorization.

242600221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 242600221 is about 15575.6290723682. The cubic root of 242600221 is about 623.6827476243.

Adding to 242600221 its reverse (122006242), we get a palindrome (364606463).

The spelling of 242600221 in words is "two hundred forty-two million, six hundred thousand, two hundred twenty-one".