242220221233 has 4 divisors (see below), whose sum is σ = 242221793380. Its totient is φ = 242218649088.

The previous prime is 242220221227. The next prime is 242220221293. The reversal of 242220221233 is 332122022242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 332122022242 = 2 ⋅166061011121.

It can be written as a sum of positive squares in 2 ways, for example, as 178407398689 + 63812822544 = 422383^2 + 252612^2 .

It is a cyclic number.

It is not a de Polignac number, because 242220221233 - 2²⁵ = 242186666801 is a prime.

It is a super-3 number, since 3×242220221233³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242220221198 and 242220221207.

It is not an unprimeable number, because it can be changed into a prime (242220221203) 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, 526368 + ... + 872641.

It is an arithmetic number, because the mean of its divisors is an integer number (60555448345).

Almost surely, 2^242220221233 is an apocalyptic number.

It is an amenable number.

242220221233 is a deficient number, since it is larger than the sum of its proper divisors (1572147).

242220221233 is a wasteful number, since it uses less digits than its factorization.

242220221233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572146.

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

Adding to 242220221233 its reverse (332122022242), we get a palindrome (574342243475).

The spelling of 242220221233 in words is "two hundred forty-two billion, two hundred twenty million, two hundred twenty-one thousand, two hundred thirty-three".