1211201112223 has 2 divisors, whose sum is σ = 1211201112224. Its totient is φ = 1211201112222.

The previous prime is 1211201112217. The next prime is 1211201112287. The reversal of 1211201112223 is 3222111021121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211201112223 - 2³³ = 1202611177631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211201112223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211201112203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605600556111 + 605600556112.

It is an arithmetic number, because the mean of its divisors is an integer number (605600556112).

Almost surely, 2^{1211201112223} is an apocalyptic number.

1211201112223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211201112223 is an equidigital number, since it uses as much as digits as its factorization.

1211201112223 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1211201112223 its reverse (3222111021121), we get a palindrome (4433312133344).

The spelling of 1211201112223 in words is "one trillion, two hundred eleven billion, two hundred one million, one hundred twelve thousand, two hundred twenty-three".