1211130321 has 8 divisors (see below), whose sum is σ = 1618520640. Its totient is φ = 805580112.

The previous prime is 1211130313. The next prime is 1211130329. The reversal of 1211130321 is 1230311121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1211130313) and next prime (1211130329).

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

It is not a de Polignac number, because 1211130321 - 2³ = 1211130313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211130321.

It is not an unprimeable number, because it can be changed into a prime (1211130329) 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, 458490 + ... + 461123.

It is an arithmetic number, because the mean of its divisors is an integer number (202315080).

Almost surely, 2^1211130321 is an apocalyptic number.

It is an amenable number.

1211130321 is a deficient number, since it is larger than the sum of its proper divisors (407390319).

1211130321 is an equidigital number, since it uses as much as digits as its factorization.

1211130321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920055.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1211130321 is about 34801.2976913218. The cubic root of 1211130321 is about 1065.9339441297.

Adding to 1211130321 its reverse (1230311121), we get a palindrome (2441441442).

The spelling of 1211130321 in words is "one billion, two hundred eleven million, one hundred thirty thousand, three hundred twenty-one".