21212011011089 has 2 divisors, whose sum is σ = 21212011011090. Its totient is φ = 21212011011088.

The previous prime is 21212011011077. The next prime is 21212011011151. The reversal of 21212011011089 is 98011011021212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19411293930625 + 1800717080464 = 4405825^2 + 1341908^2 .

It is a cyclic number.

It is not a de Polignac number, because 21212011011089 - 2⁸ = 21212011010833 is a prime.

It is a super-2 number, since 2×21212011011089² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21212011011029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606005505544 + 10606005505545.

It is an arithmetic number, because the mean of its divisors is an integer number (10606005505545).

Almost surely, 2^{21212011011089} is an apocalyptic number.

It is an amenable number.

21212011011089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212011011089 is an equidigital number, since it uses as much as digits as its factorization.

21212011011089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 29.

The spelling of 21212011011089 in words is "twenty-one trillion, two hundred twelve billion, eleven million, eleven thousand, eighty-nine".