145103330221 has 4 divisors (see below), whose sum is σ = 153638820252. Its totient is φ = 136567840192.

The previous prime is 145103330147. The next prime is 145103330227. The reversal of 145103330221 is 122033301541.

It is a happy number.

145103330221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122033301541 = 4643 ⋅26283287.

It can be written as a sum of positive squares in 2 ways, for example, as 38901645225 + 106201684996 = 197235^2 + 325886^2 .

It is a cyclic number.

It is not a de Polignac number, because 145103330221 - 2¹³ = 145103322029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145103330227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4267744990 + ... + 4267745023.

It is an arithmetic number, because the mean of its divisors is an integer number (38409705063).

Almost surely, 2^145103330221 is an apocalyptic number.

It is an amenable number.

145103330221 is a deficient number, since it is larger than the sum of its proper divisors (8535490031).

145103330221 is an equidigital number, since it uses as much as digits as its factorization.

145103330221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8535490030.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 145103330221 its reverse (122033301541), we get a palindrome (267136631762).

The spelling of 145103330221 in words is "one hundred forty-five billion, one hundred three million, three hundred thirty thousand, two hundred twenty-one".