11221221103 has 2 divisors, whose sum is σ = 11221221104. Its totient is φ = 11221221102.

The previous prime is 11221221101. The next prime is 11221221113. The reversal of 11221221103 is 30112212211.

It is a weak prime.

It is an emirp because it is prime and its reverse (30112212211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11221221103 - 2¹ = 11221221101 is a prime.

Together with 11221221101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221221101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610610551 + 5610610552.

It is an arithmetic number, because the mean of its divisors is an integer number (5610610552).

Almost surely, 2^11221221103 is an apocalyptic number.

11221221103 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221221103 is an equidigital number, since it uses as much as digits as its factorization.

11221221103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11221221103 its reverse (30112212211), we get a palindrome (41333433314).

It can be divided in two parts, 11221 and 221103, that added together give a square (232324 = 482²).

The spelling of 11221221103 in words is "eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred three".