1043121321 has 40 divisors (see below), whose sum is σ = 1704938400. Its totient is φ = 630322560.

The previous prime is 1043121311. The next prime is 1043121347. The reversal of 1043121321 is 1231213401.

1043121321 is a `hidden beast` number, since 1 + 0 + 431 + 213 + 21 = 666.

1043121321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1043121321 - 2⁶ = 1043121257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1043121294 and 1043121303.

It is not an unprimeable number, because it can be changed into a prime (1043121301) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 336145 + ... + 339233.

It is an arithmetic number, because the mean of its divisors is an integer number (42623460).

Almost surely, 2^1043121321 is an apocalyptic number.

1043121321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1043121321 is a deficient number, since it is larger than the sum of its proper divisors (661817079).

1043121321 is a wasteful number, since it uses less digits than its factorization.

1043121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491 (or 3482 counting only the distinct ones).

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

The square root of 1043121321 is about 32297.3887644187. The cubic root of 1043121321 is about 1014.1719798629.

Adding to 1043121321 its reverse (1231213401), we get a palindrome (2274334722).

The spelling of 1043121321 in words is "one billion, forty-three million, one hundred twenty-one thousand, three hundred twenty-one".