12106525266221 has 2 divisors, whose sum is σ = 12106525266222. Its totient is φ = 12106525266220.

The previous prime is 12106525266203. The next prime is 12106525266247. The reversal of 12106525266221 is 12266252560121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11733289801321 + 373235464900 = 3425389^2 + 610930^2 .

It is a cyclic number.

It is not a de Polignac number, because 12106525266221 - 2²⁶ = 12106458157357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12106525266271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6053262633110 + 6053262633111.

It is an arithmetic number, because the mean of its divisors is an integer number (6053262633111).

Almost surely, 2^{12106525266221} is an apocalyptic number.

It is an amenable number.

12106525266221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12106525266221 is an equidigital number, since it uses as much as digits as its factorization.

12106525266221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 12106525266221 in words is "twelve trillion, one hundred six billion, five hundred twenty-five million, two hundred sixty-six thousand, two hundred twenty-one".