212020300109 has 4 divisors (see below), whose sum is σ = 212024259516. Its totient is φ = 212016340704.

The previous prime is 212020300061. The next prime is 212020300117. The reversal of 212020300109 is 901003020212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 157547074084 + 54473226025 = 396922^2 + 233395^2 .

It is a cyclic number.

It is not a de Polignac number, because 212020300109 - 2⁸ = 212020299853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020300139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1898264 + ... + 2006849.

It is an arithmetic number, because the mean of its divisors is an integer number (53006064879).

Almost surely, 2^212020300109 is an apocalyptic number.

It is an amenable number.

212020300109 is a deficient number, since it is larger than the sum of its proper divisors (3959407).

212020300109 is an equidigital number, since it uses as much as digits as its factorization.

212020300109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3959406.

The product of its (nonzero) digits is 216, while the sum is 20.

The spelling of 212020300109 in words is "two hundred twelve billion, twenty million, three hundred thousand, one hundred nine".