1211211323 has 8 divisors (see below), whose sum is σ = 1428894720. Its totient is φ = 1004691240.

The previous prime is 1211211307. The next prime is 1211211329. The reversal of 1211211323 is 3231121121.

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

It is not a de Polignac number, because 1211211323 - 2⁴ = 1211211307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211211329) 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, 2790593 + ... + 2791026.

It is an arithmetic number, because the mean of its divisors is an integer number (178611840).

Almost surely, 2^1211211323 is an apocalyptic number.

1211211323 is a deficient number, since it is larger than the sum of its proper divisors (217683397).

1211211323 is an equidigital number, since it uses as much as digits as its factorization.

1211211323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5581657.

The product of its digits is 72, while the sum is 17.

The square root of 1211211323 is about 34802.4614503055. The cubic root of 1211211323 is about 1065.9577072912.

Adding to 1211211323 its reverse (3231121121), we get a palindrome (4442332444).

The spelling of 1211211323 in words is "one billion, two hundred eleven million, two hundred eleven thousand, three hundred twenty-three".