212220112109 has 2 divisors, whose sum is σ = 212220112110. Its totient is φ = 212220112108.

The previous prime is 212220112103. The next prime is 212220112121. The reversal of 212220112109 is 901211022212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200175708100 + 12044404009 = 447410^2 + 109747^2 .

It is a cyclic number.

It is not a de Polignac number, because 212220112109 - 2⁸ = 212220111853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212220112103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110056054 + 106110056055.

It is an arithmetic number, because the mean of its divisors is an integer number (106110056055).

Almost surely, 2^212220112109 is an apocalyptic number.

It is an amenable number.

212220112109 is a deficient number, since it is larger than the sum of its proper divisors (1).

212220112109 is an equidigital number, since it uses as much as digits as its factorization.

212220112109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 212220112109 in words is "two hundred twelve billion, two hundred twenty million, one hundred twelve thousand, one hundred nine".