212198015069 has 2 divisors, whose sum is σ = 212198015070. Its totient is φ = 212198015068.

The previous prime is 212198015059. The next prime is 212198015083. The reversal of 212198015069 is 960510891212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207354551044 + 4843464025 = 455362^2 + 69595^2 .

It is a cyclic number.

It is not a de Polignac number, because 212198015069 - 2¹⁶ = 212197949533 is a prime.

It is a super-2 number, since 2×212198015069² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212198015059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106099007534 + 106099007535.

It is an arithmetic number, because the mean of its divisors is an integer number (106099007535).

Almost surely, 2^212198015069 is an apocalyptic number.

It is an amenable number.

212198015069 is a deficient number, since it is larger than the sum of its proper divisors (1).

212198015069 is an equidigital number, since it uses as much as digits as its factorization.

212198015069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 44.

The spelling of 212198015069 in words is "two hundred twelve billion, one hundred ninety-eight million, fifteen thousand, sixty-nine".