212002122109 has 2 divisors, whose sum is σ = 212002122110. Its totient is φ = 212002122108.

The previous prime is 212002122091. The next prime is 212002122161. The reversal of 212002122109 is 901221200212.

Together with previous prime (212002122091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122048916025 + 89953206084 = 349355^2 + 299922^2 .

It is a cyclic number.

It is not a de Polignac number, because 212002122109 - 2¹⁷ = 212001991037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212002122109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212002162109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106001061054 + 106001061055.

It is an arithmetic number, because the mean of its divisors is an integer number (106001061055).

Almost surely, 2^212002122109 is an apocalyptic number.

It is an amenable number.

212002122109 is a deficient number, since it is larger than the sum of its proper divisors (1).

212002122109 is an equidigital number, since it uses as much as digits as its factorization.

212002122109 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 22.

The spelling of 212002122109 in words is "two hundred twelve billion, two million, one hundred twenty-two thousand, one hundred nine".