211021211211229 has 2 divisors, whose sum is σ = 211021211211230. Its totient is φ = 211021211211228.

The previous prime is 211021211211191. The next prime is 211021211211269. The reversal of 211021211211229 is 922112112120112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151961955471225 + 59059255740004 = 12327285^2 + 7685002^2 .

It is a cyclic number.

It is not a de Polignac number, because 211021211211229 - 2¹⁵ = 211021211178461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211021211211197 and 211021211211206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211021211211269) 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, 105510605605614 + 105510605605615.

It is an arithmetic number, because the mean of its divisors is an integer number (105510605605615).

Almost surely, 2^{211021211211229} is an apocalyptic number.

It is an amenable number.

211021211211229 is a deficient number, since it is larger than the sum of its proper divisors (1).

211021211211229 is an equidigital number, since it uses as much as digits as its factorization.

211021211211229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 211021211211229 in words is "two hundred eleven trillion, twenty-one billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-nine".