210021300289 has 2 divisors, whose sum is σ = 210021300290. Its totient is φ = 210021300288.

The previous prime is 210021300277. The next prime is 210021300347. The reversal of 210021300289 is 982003120012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201271568689 + 8749731600 = 448633^2 + 93540^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021300289 - 2⁵ = 210021300257 is a prime.

It is a super-2 number, since 2×210021300289² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210021300239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010650144 + 105010650145.

It is an arithmetic number, because the mean of its divisors is an integer number (105010650145).

Almost surely, 2^210021300289 is an apocalyptic number.

It is an amenable number.

210021300289 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021300289 is an equidigital number, since it uses as much as digits as its factorization.

210021300289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 210021300289 in words is "two hundred ten billion, twenty-one million, three hundred thousand, two hundred eighty-nine".