12121221103 has 2 divisors, whose sum is σ = 12121221104. Its totient is φ = 12121221102.

The previous prime is 12121221041. The next prime is 12121221121. The reversal of 12121221103 is 30112212121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12121221103 - 2²⁵ = 12087666671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121221163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060610551 + 6060610552.

It is an arithmetic number, because the mean of its divisors is an integer number (6060610552).

Almost surely, 2^12121221103 is an apocalyptic number.

12121221103 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121221103 is an equidigital number, since it uses as much as digits as its factorization.

12121221103 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 12121221103 its reverse (30112212121), we get a palindrome (42233433224).

The spelling of 12121221103 in words is "twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred three".