1211323230223 has 4 divisors (see below), whose sum is σ = 1263989457648. Its totient is φ = 1158657002800.

The previous prime is 1211323230193. The next prime is 1211323230281. The reversal of 1211323230223 is 3220323231121.

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 1211323230223 - 2²⁹ = 1210786359311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211323230323) 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, 26333113678 + ... + 26333113723.

It is an arithmetic number, because the mean of its divisors is an integer number (315997364412).

Almost surely, 2^{1211323230223} is an apocalyptic number.

1211323230223 is a deficient number, since it is larger than the sum of its proper divisors (52666227425).

1211323230223 is an equidigital number, since it uses as much as digits as its factorization.

1211323230223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52666227424.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1211323230223 its reverse (3220323231121), we get a palindrome (4431646461344).

The spelling of 1211323230223 in words is "one trillion, two hundred eleven billion, three hundred twenty-three million, two hundred thirty thousand, two hundred twenty-three".