212121001210211 has 2 divisors, whose sum is σ = 212121001210212. Its totient is φ = 212121001210210.

The previous prime is 212121001210193. The next prime is 212121001210289. The reversal of 212121001210211 is 112012100121212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212121001210211 is a prime.

It is a super-3 number, since 3×212121001210211³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 212121001210211.

It is not a weakly prime, because it can be changed into another prime (212121001218211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060500605105 + 106060500605106.

It is an arithmetic number, because the mean of its divisors is an integer number (106060500605106).

Almost surely, 2^{212121001210211} is an apocalyptic number.

212121001210211 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121001210211 is an equidigital number, since it uses as much as digits as its factorization.

212121001210211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212121001210211 its reverse (112012100121212), we get a palindrome (324133101331423).

The spelling of 212121001210211 in words is "two hundred twelve trillion, one hundred twenty-one billion, one million, two hundred ten thousand, two hundred eleven".