1211323323 has 8 divisors (see below), whose sum is σ = 1845826048. Its totient is φ = 692184744.

The previous prime is 1211323307. The next prime is 1211323327. The reversal of 1211323323 is 3233231121.

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

It is not a de Polignac number, because 1211323323 - 2⁴ = 1211323307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 57682063 = 1211323323 / (1 + 2 + 1 + 1 + 3 + 2 + 3 + 3 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211323323.

It is not an unprimeable number, because it can be changed into a prime (1211323327) 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, 28841011 + ... + 28841052.

It is an arithmetic number, because the mean of its divisors is an integer number (230728256).

Almost surely, 2^1211323323 is an apocalyptic number.

1211323323 is a deficient number, since it is larger than the sum of its proper divisors (634502725).

1211323323 is an equidigital number, since it uses as much as digits as its factorization.

1211323323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57682073.

The product of its digits is 648, while the sum is 21.

The square root of 1211323323 is about 34804.0704946993. The cubic root of 1211323323 is about 1065.9905624397.

Adding to 1211323323 its reverse (3233231121), we get a palindrome (4444554444).

The spelling of 1211323323 in words is "one billion, two hundred eleven million, three hundred twenty-three thousand, three hundred twenty-three".