1211223323 has 4 divisors (see below), whose sum is σ = 1236994080. Its totient is φ = 1185452568.

The previous prime is 1211223319. The next prime is 1211223337. The reversal of 1211223323 is 3233221121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1211223323 - 2² = 1211223319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211223295 and 1211223304.

It is not an unprimeable number, because it can be changed into a prime (1211223313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12885308 + ... + 12885401.

It is an arithmetic number, because the mean of its divisors is an integer number (309248520).

Almost surely, 2^1211223323 is an apocalyptic number.

1211223323 is a deficient number, since it is larger than the sum of its proper divisors (25770757).

1211223323 is an equidigital number, since it uses as much as digits as its factorization.

1211223323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25770756.

The product of its digits is 432, while the sum is 20.

The square root of 1211223323 is about 34802.6338514774. The cubic root of 1211223323 is about 1065.9612275826.

Adding to 1211223323 its reverse (3233221121), we get a palindrome (4444444444).

The spelling of 1211223323 in words is "one billion, two hundred eleven million, two hundred twenty-three thousand, three hundred twenty-three".