21210210120089 has 2 divisors, whose sum is σ = 21210210120090. Its totient is φ = 21210210120088.

The previous prime is 21210210119977. The next prime is 21210210120137. The reversal of 21210210120089 is 98002101201212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17863809433600 + 3346400686489 = 4226560^2 + 1829317^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210210120089 is a prime.

It is not a weakly prime, because it can be changed into another prime (21210210120689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605105060044 + 10605105060045.

It is an arithmetic number, because the mean of its divisors is an integer number (10605105060045).

Almost surely, 2^{21210210120089} is an apocalyptic number.

It is an amenable number.

21210210120089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210210120089 is an equidigital number, since it uses as much as digits as its factorization.

21210210120089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 21210210120089 in words is "twenty-one trillion, two hundred ten billion, two hundred ten million, one hundred twenty thousand, eighty-nine".