12012102122221 has 2 divisors, whose sum is σ = 12012102122222. Its totient is φ = 12012102122220.

The previous prime is 12012102122117. The next prime is 12012102122291. The reversal of 12012102122221 is 12222120121021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7557765241321 + 4454336880900 = 2749139^2 + 2110530^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012102122221 - 2⁷ = 12012102122093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12012102122291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006051061110 + 6006051061111.

It is an arithmetic number, because the mean of its divisors is an integer number (6006051061111).

Almost surely, 2^{12012102122221} is an apocalyptic number.

It is an amenable number.

12012102122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012102122221 is an equidigital number, since it uses as much as digits as its factorization.

12012102122221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12012102122221 its reverse (12222120121021), we get a palindrome (24234222243242).

The spelling of 12012102122221 in words is "twelve trillion, twelve billion, one hundred two million, one hundred twenty-two thousand, two hundred twenty-one".