12103110221221 has 2 divisors, whose sum is σ = 12103110221222. Its totient is φ = 12103110221220.

The previous prime is 12103110221203. The next prime is 12103110221249. The reversal of 12103110221221 is 12212201130121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7717206216196 + 4385904005025 = 2777986^2 + 2094255^2 .

It is a cyclic number.

It is not a de Polignac number, because 12103110221221 - 2³⁵ = 12068750482853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12103110521221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051555110610 + 6051555110611.

It is an arithmetic number, because the mean of its divisors is an integer number (6051555110611).

Almost surely, 2^{12103110221221} is an apocalyptic number.

It is an amenable number.

12103110221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12103110221221 is an equidigital number, since it uses as much as digits as its factorization.

12103110221221 is an evil number, because the sum of its binary digits is even.

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

Adding to 12103110221221 its reverse (12212201130121), we get a palindrome (24315311351342).

The spelling of 12103110221221 in words is "twelve trillion, one hundred three billion, one hundred ten million, two hundred twenty-one thousand, two hundred twenty-one".