212121012163 has 2 divisors, whose sum is σ = 212121012164. Its totient is φ = 212121012162.

The previous prime is 212121012157. The next prime is 212121012221. The reversal of 212121012163 is 361210121212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212121012163 - 2²¹ = 212118915011 is a prime.

It is a super-3 number, since 3×212121012163³ (a number of 35 digits) contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (212121012113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060506081 + 106060506082.

It is an arithmetic number, because the mean of its divisors is an integer number (106060506082).

Almost surely, 2^212121012163 is an apocalyptic number.

212121012163 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121012163 is an equidigital number, since it uses as much as digits as its factorization.

212121012163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 212121012163 its reverse (361210121212), we get a palindrome (573331133375).

The spelling of 212121012163 in words is "two hundred twelve billion, one hundred twenty-one million, twelve thousand, one hundred sixty-three".