21202120198163 has 2 divisors, whose sum is σ = 21202120198164. Its totient is φ = 21202120198162.

The previous prime is 21202120198117. The next prime is 21202120198169. The reversal of 21202120198163 is 36189102120212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202120198163 - 2³⁰ = 21201046456339 is a prime.

It is not a weakly prime, because it can be changed into another prime (21202120198169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601060099081 + 10601060099082.

It is an arithmetic number, because the mean of its divisors is an integer number (10601060099082).

Almost surely, 2^{21202120198163} is an apocalyptic number.

21202120198163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202120198163 is an equidigital number, since it uses as much as digits as its factorization.

21202120198163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 21202120198163 in words is "twenty-one trillion, two hundred two billion, one hundred twenty million, one hundred ninety-eight thousand, one hundred sixty-three".