1211120211223 has 4 divisors (see below), whose sum is σ = 1304283304408. Its totient is φ = 1117957118040.

The previous prime is 1211120211199. The next prime is 1211120211233. The reversal of 1211120211223 is 3221120211121.

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 1211120211223 - 2²⁹ = 1210583340311 is a prime.

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 1211120211223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211120211233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46581546573 + ... + 46581546598.

It is an arithmetic number, because the mean of its divisors is an integer number (326070826102).

Almost surely, 2^{1211120211223} is an apocalyptic number.

1211120211223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1211120211223 is a deficient number, since it is larger than the sum of its proper divisors (93163093185).

1211120211223 is an equidigital number, since it uses as much as digits as its factorization.

1211120211223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93163093184.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1211120211223 its reverse (3221120211121), we get a palindrome (4432240422344).

The spelling of 1211120211223 in words is "one trillion, two hundred eleven billion, one hundred twenty million, two hundred eleven thousand, two hundred twenty-three".