1211040321 has 8 divisors (see below), whose sum is σ = 1684925760. Its totient is φ = 772257552.

The previous prime is 1211040307. The next prime is 1211040349. The reversal of 1211040321 is 1230401121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211040321 - 2¹¹ = 1211038273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211040321.

It is not an unprimeable number, because it can be changed into a prime (1211040371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8775586 + ... + 8775723.

It is an arithmetic number, because the mean of its divisors is an integer number (210615720).

Almost surely, 2^1211040321 is an apocalyptic number.

It is an amenable number.

1211040321 is a deficient number, since it is larger than the sum of its proper divisors (473885439).

1211040321 is a wasteful number, since it uses less digits than its factorization.

1211040321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17551335.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1211040321 is about 34800.0046120687. The cubic root of 1211040321 is about 1065.9075400261.

Adding to 1211040321 its reverse (1230401121), we get a palindrome (2441441442).

The spelling of 1211040321 in words is "one billion, two hundred eleven million, forty thousand, three hundred twenty-one".