1211224203223 has 4 divisors (see below), whose sum is σ = 1215504147688. Its totient is φ = 1206944258760.

The previous prime is 1211224203193. The next prime is 1211224203227. The reversal of 1211224203223 is 3223024221121.

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 1211224203223 - 2³⁷ = 1073785249751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211224203227) 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, 2139971808 + ... + 2139972373.

It is an arithmetic number, because the mean of its divisors is an integer number (303876036922).

Almost surely, 2^{1211224203223} is an apocalyptic number.

1211224203223 is a deficient number, since it is larger than the sum of its proper divisors (4279944465).

1211224203223 is an equidigital number, since it uses as much as digits as its factorization.

1211224203223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4279944464.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1211224203223 its reverse (3223024221121), we get a palindrome (4434248424344).

The spelling of 1211224203223 in words is "one trillion, two hundred eleven billion, two hundred twenty-four million, two hundred three thousand, two hundred twenty-three".