212121300289 has 2 divisors, whose sum is σ = 212121300290. Its totient is φ = 212121300288.

The previous prime is 212121300269. The next prime is 212121300341. The reversal of 212121300289 is 982003121212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133438245264 + 78683055025 = 365292^2 + 280505^2 .

It is a cyclic number.

It is not a de Polignac number, because 212121300289 - 2⁷ = 212121300161 is a prime.

It is a super-2 number, since 2×212121300289² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212121300289.

It is not a weakly prime, because it can be changed into another prime (212121300229) 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, 106060650144 + 106060650145.

It is an arithmetic number, because the mean of its divisors is an integer number (106060650145).

Almost surely, 2^212121300289 is an apocalyptic number.

It is an amenable number.

212121300289 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121300289 is an equidigital number, since it uses as much as digits as its factorization.

212121300289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 212121300289 in words is "two hundred twelve billion, one hundred twenty-one million, three hundred thousand, two hundred eighty-nine".