211100211221213 has 2 divisors, whose sum is σ = 211100211221214. Its totient is φ = 211100211221212.

The previous prime is 211100211221209. The next prime is 211100211221267. The reversal of 211100211221213 is 312122112001112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155197104742969 + 55903106478244 = 12457813^2 + 7476838^2 .

It is a cyclic number.

It is not a de Polignac number, because 211100211221213 - 2² = 211100211221209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211100211221413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105550105610606 + 105550105610607.

It is an arithmetic number, because the mean of its divisors is an integer number (105550105610607).

Almost surely, 2^{211100211221213} is an apocalyptic number.

It is an amenable number.

211100211221213 is a deficient number, since it is larger than the sum of its proper divisors (1).

211100211221213 is an equidigital number, since it uses as much as digits as its factorization.

211100211221213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 211100211221213 its reverse (312122112001112), we get a palindrome (523222323222325).

The spelling of 211100211221213 in words is "two hundred eleven trillion, one hundred billion, two hundred eleven million, two hundred twenty-one thousand, two hundred thirteen".