1143223121 has 8 divisors (see below), whose sum is σ = 1149168384. Its totient is φ = 1137287200.

The previous prime is 1143223099. The next prime is 1143223127. The reversal of 1143223121 is 1213223411.

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 1143223121 - 2⁶ = 1143223057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1143223093 and 1143223102.

It is not an unprimeable number, because it can be changed into a prime (1143223127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485096 + ... + 487446.

It is an arithmetic number, because the mean of its divisors is an integer number (143646048).

Almost surely, 2^1143223121 is an apocalyptic number.

It is an amenable number.

1143223121 is a deficient number, since it is larger than the sum of its proper divisors (5945263).

1143223121 is a wasteful number, since it uses less digits than its factorization.

1143223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671.

The product of its digits is 288, while the sum is 20.

The square root of 1143223121 is about 33811.5826455965. The cubic root of 1143223121 is about 1045.6275073977.

Adding to 1143223121 its reverse (1213223411), we get a palindrome (2356446532).

The spelling of 1143223121 in words is "one billion, one hundred forty-three million, two hundred twenty-three thousand, one hundred twenty-one".