211100011222021 has 2 divisors, whose sum is σ = 211100011222022. Its totient is φ = 211100011222020.

The previous prime is 211100011221991. The next prime is 211100011222057. The reversal of 211100011222021 is 120222110001112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131388791625025 + 79711219596996 = 11462495^2 + 8928114^2 .

It is a cyclic number.

It is not a de Polignac number, because 211100011222021 - 2⁴⁷ = 70362522866693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211100011221986 and 211100011222004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211100011229021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105550005611010 + 105550005611011.

It is an arithmetic number, because the mean of its divisors is an integer number (105550005611011).

Almost surely, 2^{211100011222021} is an apocalyptic number.

It is an amenable number.

211100011222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

211100011222021 is an equidigital number, since it uses as much as digits as its factorization.

211100011222021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211100011222021 its reverse (120222110001112), we get a palindrome (331322121223133).

The spelling of 211100011222021 in words is "two hundred eleven trillion, one hundred billion, eleven million, two hundred twenty-two thousand, twenty-one".