211021021220089 has 2 divisors, whose sum is σ = 211021021220090. Its totient is φ = 211021021220088.

The previous prime is 211021021220003. The next prime is 211021021220137. The reversal of 211021021220089 is 980022120120112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112442334677689 + 98578686542400 = 10603883^2 + 9928680^2 .

It is a cyclic number.

It is not a de Polignac number, because 211021021220089 - 2¹⁹ = 211021020695801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211021021220089.

It is not a weakly prime, because it can be changed into another prime (211021021221089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510510610044 + 105510510610045.

It is an arithmetic number, because the mean of its divisors is an integer number (105510510610045).

Almost surely, 2^{211021021220089} is an apocalyptic number.

It is an amenable number.

211021021220089 is a deficient number, since it is larger than the sum of its proper divisors (1).

211021021220089 is an equidigital number, since it uses as much as digits as its factorization.

211021021220089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 211021021220089 in words is "two hundred eleven trillion, twenty-one billion, twenty-one million, two hundred twenty thousand, eighty-nine".