143321121 has 12 divisors (see below), whose sum is σ = 209070420. Its totient is φ = 94600800.

The previous prime is 143321099. The next prime is 143321131. The reversal of 143321121 is 121123341.

143321121 is a `hidden beast` number, since 1 + 433 + 211 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 89870400 + 53450721 = 9480^2 + 7311^2 .

It is not a de Polignac number, because 143321121 - 2¹³ = 143312929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 143321094 and 143321103.

It is not an unprimeable number, because it can be changed into a prime (143321131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77926 + ... + 79743.

It is an arithmetic number, because the mean of its divisors is an integer number (17422535).

Almost surely, 2^143321121 is an apocalyptic number.

It is an amenable number.

143321121 is a deficient number, since it is larger than the sum of its proper divisors (65749299).

143321121 is a wasteful number, since it uses less digits than its factorization.

143321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157776 (or 157773 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 143321121 is about 11971.6799572992. The cubic root of 143321121 is about 523.3232929317.

Adding to 143321121 its reverse (121123341), we get a palindrome (264444462).

The spelling of 143321121 in words is "one hundred forty-three million, three hundred twenty-one thousand, one hundred twenty-one".