212020110109 has 2 divisors, whose sum is σ = 212020110110. Its totient is φ = 212020110108.

The previous prime is 212020110089. The next prime is 212020110119. The reversal of 212020110109 is 901011020212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150949344484 + 61070765625 = 388522^2 + 247125^2 .

It is a cyclic number.

It is not a de Polignac number, because 212020110109 - 2⁷ = 212020109981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212020110119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010055054 + 106010055055.

It is an arithmetic number, because the mean of its divisors is an integer number (106010055055).

Almost surely, 2^212020110109 is an apocalyptic number.

It is an amenable number.

212020110109 is a deficient number, since it is larger than the sum of its proper divisors (1).

212020110109 is an equidigital number, since it uses as much as digits as its factorization.

212020110109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 212020110109 in words is "two hundred twelve billion, twenty million, one hundred ten thousand, one hundred nine".