143423041221 has 6 divisors (see below), whose sum is σ = 207166615110. Its totient is φ = 95615360808.

The previous prime is 143423041213. The next prime is 143423041241. The reversal of 143423041221 is 122140324341.

143423041221 is a `hidden beast` number, since 1 + 4 + 342 + 304 + 12 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 104319956196 + 39103085025 = 322986^2 + 197745^2 .

It is not a de Polignac number, because 143423041221 - 2³ = 143423041213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143423041241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7967946726 + ... + 7967946743.

It is an arithmetic number, because the mean of its divisors is an integer number (34527769185).

Almost surely, 2^143423041221 is an apocalyptic number.

It is an amenable number.

143423041221 is a deficient number, since it is larger than the sum of its proper divisors (63743573889).

143423041221 is a wasteful number, since it uses less digits than its factorization.

143423041221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15935893475 (or 15935893472 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 143423041221 its reverse (122140324341), we get a palindrome (265563365562).

The spelling of 143423041221 in words is "one hundred forty-three billion, four hundred twenty-three million, forty-one thousand, two hundred twenty-one".