12037191396221 has 2 divisors, whose sum is σ = 12037191396222. Its totient is φ = 12037191396220.

The previous prime is 12037191396163. The next prime is 12037191396239. The reversal of 12037191396221 is 12269319173021.

12037191396221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12010480396996 + 26710999225 = 3465614^2 + 163435^2 .

It is a cyclic number.

It is not a de Polignac number, because 12037191396221 - 2¹⁸ = 12037191134077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12037191396121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6018595698110 + 6018595698111.

It is an arithmetic number, because the mean of its divisors is an integer number (6018595698111).

Almost surely, 2^{12037191396221} is an apocalyptic number.

It is an amenable number.

12037191396221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12037191396221 is an equidigital number, since it uses as much as digits as its factorization.

12037191396221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 12037191396221 in words is "twelve trillion, thirty-seven billion, one hundred ninety-one million, three hundred ninety-six thousand, two hundred twenty-one".