12020197655689 has 2 divisors, whose sum is σ = 12020197655690. Its totient is φ = 12020197655688.

The previous prime is 12020197655681. The next prime is 12020197655693. The reversal of 12020197655689 is 98655679102021.

12020197655689 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., 11487239254089 + 532958401600 = 3389283^2 + 730040^2 .

It is an emirp because it is prime and its reverse (98655679102021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12020197655689 - 2³ = 12020197655681 is a prime.

It is not a weakly prime, because it can be changed into another prime (12020197655681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010098827844 + 6010098827845.

It is an arithmetic number, because the mean of its divisors is an integer number (6010098827845).

Almost surely, 2^{12020197655689} is an apocalyptic number.

It is an amenable number.

12020197655689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12020197655689 is an equidigital number, since it uses as much as digits as its factorization.

12020197655689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16329600, while the sum is 61.

The spelling of 12020197655689 in words is "twelve trillion, twenty billion, one hundred ninety-seven million, six hundred fifty-five thousand, six hundred eighty-nine".