211212212201 has 2 divisors, whose sum is σ = 211212212202. Its totient is φ = 211212212200.

The previous prime is 211212212191. The next prime is 211212212221. The reversal of 211212212201 is 102212212112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210360739801 + 851472400 = 458651^2 + 29180^2 .

It is a cyclic number.

It is not a de Polignac number, because 211212212201 - 2⁶ = 211212212137 is a prime.

It is a super-2 number, since 2×211212212201² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211212212201.

It is not a weakly prime, because it can be changed into another prime (211212212221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606106100 + 105606106101.

It is an arithmetic number, because the mean of its divisors is an integer number (105606106101).

Almost surely, 2^211212212201 is an apocalyptic number.

It is an amenable number.

211212212201 is a deficient number, since it is larger than the sum of its proper divisors (1).

211212212201 is an equidigital number, since it uses as much as digits as its factorization.

211212212201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211212212201 its reverse (102212212112), we get a palindrome (313424424313).

It can be divided in two parts, 21121 and 2212201, that added together give a palindrome (2233322).

The spelling of 211212212201 in words is "two hundred eleven billion, two hundred twelve million, two hundred twelve thousand, two hundred one".