212020003309 has 2 divisors, whose sum is σ = 212020003310. Its totient is φ = 212020003308.

The previous prime is 212020003303. The next prime is 212020003331. The reversal of 212020003309 is 903300020212.

It is an a-pointer prime, because the next prime (212020003331) can be obtained adding 212020003309 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141169275625 + 70850727684 = 375725^2 + 266178^2 .

It is a cyclic number.

It is not a de Polignac number, because 212020003309 - 2³ = 212020003301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212020003309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212020003301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010001654 + 106010001655.

It is an arithmetic number, because the mean of its divisors is an integer number (106010001655).

Almost surely, 2^212020003309 is an apocalyptic number.

It is an amenable number.

212020003309 is a deficient number, since it is larger than the sum of its proper divisors (1).

212020003309 is an equidigital number, since it uses as much as digits as its factorization.

212020003309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The spelling of 212020003309 in words is "two hundred twelve billion, twenty million, three thousand, three hundred nine".