1221103223 has 2 divisors, whose sum is σ = 1221103224. Its totient is φ = 1221103222.

The previous prime is 1221103211. The next prime is 1221103241. The reversal of 1221103223 is 3223011221.

It is a weak prime.

It is an emirp because it is prime and its reverse (3223011221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221103223 - 2⁶ = 1221103159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221103823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610551611 + 610551612.

It is an arithmetic number, because the mean of its divisors is an integer number (610551612).

Almost surely, 2^1221103223 is an apocalyptic number.

1221103223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221103223 is an equidigital number, since it uses as much as digits as its factorization.

1221103223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1221103223 is about 34944.2874158281. The cubic root of 1221103223 is about 1068.8517168764.

Adding to 1221103223 its reverse (3223011221), we get a palindrome (4444114444).

The spelling of 1221103223 in words is "one billion, two hundred twenty-one million, one hundred three thousand, two hundred twenty-three".