242221023217 has 4 divisors (see below), whose sum is σ = 248767537396. Its totient is φ = 235674509040.

The previous prime is 242221023203. The next prime is 242221023221. The reversal of 242221023217 is 712320122242.

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 83696804416 + 158524218801 = 289304^2 + 398151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242221023217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242221023277) 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, 3273257034 + ... + 3273257107.

It is an arithmetic number, because the mean of its divisors is an integer number (62191884349).

Almost surely, 2^242221023217 is an apocalyptic number.

It is an amenable number.

242221023217 is a deficient number, since it is larger than the sum of its proper divisors (6546514179).

242221023217 is an equidigital number, since it uses as much as digits as its factorization.

242221023217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6546514178.

The product of its (nonzero) digits is 5376, while the sum is 28.

Adding to 242221023217 its reverse (712320122242), we get a palindrome (954541145459).

The spelling of 242221023217 in words is "two hundred forty-two billion, two hundred twenty-one million, twenty-three thousand, two hundred seventeen".