1143320121 has 12 divisors (see below), whose sum is σ = 1652025648. Its totient is φ = 761953464.

The previous prime is 1143320119. The next prime is 1143320131. The reversal of 1143320121 is 1210233411.

1143320121 is a `hidden beast` number, since 11 + 433 + 201 + 21 = 666.

It is not a de Polignac number, because 1143320121 - 2¹ = 1143320119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1143320094 and 1143320103.

It is not an unprimeable number, because it can be changed into a prime (1143320111) 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, 8386 + ... + 48548.

It is an arithmetic number, because the mean of its divisors is an integer number (137668804).

Almost surely, 2^1143320121 is an apocalyptic number.

It is an amenable number.

1143320121 is a deficient number, since it is larger than the sum of its proper divisors (508705527).

1143320121 is a wasteful number, since it uses less digits than its factorization.

1143320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43332 (or 43329 counting only the distinct ones).

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

The square root of 1143320121 is about 33813.0170348640. The cubic root of 1143320121 is about 1045.6570796360.

Adding to 1143320121 its reverse (1210233411), we get a palindrome (2353553532).

The spelling of 1143320121 in words is "one billion, one hundred forty-three million, three hundred twenty thousand, one hundred twenty-one".