2121201220163 has 2 divisors, whose sum is σ = 2121201220164. Its totient is φ = 2121201220162.

The previous prime is 2121201220123. The next prime is 2121201220199. The reversal of 2121201220163 is 3610221021212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121201220163 - 2²⁴ = 2121184442947 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121201220123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060600610081 + 1060600610082.

It is an arithmetic number, because the mean of its divisors is an integer number (1060600610082).

Almost surely, 2^{2121201220163} is an apocalyptic number.

2121201220163 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121201220163 is an equidigital number, since it uses as much as digits as its factorization.

2121201220163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 2121201220163 its reverse (3610221021212), we get a palindrome (5731422241375).

The spelling of 2121201220163 in words is "two trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty thousand, one hundred sixty-three".