211021213093 has 2 divisors, whose sum is σ = 211021213094. Its totient is φ = 211021213092.

The previous prime is 211021213087. The next prime is 211021213127. The reversal of 211021213093 is 390312120112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114959649249 + 96061563844 = 339057^2 + 309938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211021213093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211021213003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510606546 + 105510606547.

It is an arithmetic number, because the mean of its divisors is an integer number (105510606547).

Almost surely, 2^211021213093 is an apocalyptic number.

It is an amenable number.

211021213093 is a deficient number, since it is larger than the sum of its proper divisors (1).

211021213093 is an equidigital number, since it uses as much as digits as its factorization.

211021213093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 211021213093 in words is "two hundred eleven billion, twenty-one million, two hundred thirteen thousand, ninety-three".