143605603121221 has 8 divisors (see below), whose sum is σ = 151163902768320. Its totient is φ = 136047314475072.

The previous prime is 143605603121213. The next prime is 143605603121263. The reversal of 143605603121221 is 122121306506341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 143605603121221 - 2³ = 143605603121213 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 (143605603121621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49424616 + ... + 52249438.

It is an arithmetic number, because the mean of its divisors is an integer number (18895487846040).

Almost surely, 2^{143605603121221} is an apocalyptic number.

It is an amenable number.

143605603121221 is a deficient number, since it is larger than the sum of its proper divisors (7558299647099).

143605603121221 is a wasteful number, since it uses less digits than its factorization.

143605603121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500475.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 143605603121221 its reverse (122121306506341), we get a palindrome (265726909627562).

The spelling of 143605603121221 in words is "one hundred forty-three trillion, six hundred five billion, six hundred three million, one hundred twenty-one thousand, two hundred twenty-one".