211212201022213 has 2 divisors, whose sum is σ = 211212201022214. Its totient is φ = 211212201022212.

The previous prime is 211212201022169. The next prime is 211212201022271. The reversal of 211212201022213 is 312220102212112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203727035796804 + 7485165225409 = 14273298^2 + 2735903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211212201022213 is a prime.

It is a super-2 number, since 2×211212201022213² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211212201022013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606100511106 + 105606100511107.

It is an arithmetic number, because the mean of its divisors is an integer number (105606100511107).

Almost surely, 2^{211212201022213} is an apocalyptic number.

It is an amenable number.

211212201022213 is a deficient number, since it is larger than the sum of its proper divisors (1).

211212201022213 is an equidigital number, since it uses as much as digits as its factorization.

211212201022213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 211212201022213 its reverse (312220102212112), we get a palindrome (523432303234325).

The spelling of 211212201022213 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred one million, twenty-two thousand, two hundred thirteen".