12110002211521 has 2 divisors, whose sum is σ = 12110002211522. Its totient is φ = 12110002211520.

The previous prime is 12110002211473. The next prime is 12110002211603. The reversal of 12110002211521 is 12511220001121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10516815505296 + 1593186706225 = 3242964^2 + 1262215^2 .

It is a cyclic number.

It is not a de Polignac number, because 12110002211521 - 2²⁷ = 12109867993793 is a prime.

It is not a weakly prime, because it can be changed into another prime (12110002214521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055001105760 + 6055001105761.

It is an arithmetic number, because the mean of its divisors is an integer number (6055001105761).

Almost surely, 2^{12110002211521} is an apocalyptic number.

It is an amenable number.

12110002211521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12110002211521 is an equidigital number, since it uses as much as digits as its factorization.

12110002211521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 12110002211521 its reverse (12511220001121), we get a palindrome (24621222212642).

The spelling of 12110002211521 in words is "twelve trillion, one hundred ten billion, two million, two hundred eleven thousand, five hundred twenty-one".