212030012309 has 2 divisors, whose sum is σ = 212030012310. Its totient is φ = 212030012308.

The previous prime is 212030012303. The next prime is 212030012371. The reversal of 212030012309 is 903210030212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121923180625 + 90106831684 = 349175^2 + 300178^2 .

It is a cyclic number.

It is not a de Polignac number, because 212030012309 - 2¹² = 212030008213 is a prime.

It is a super-2 number, since 2×212030012309² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212030012303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106015006154 + 106015006155.

It is an arithmetic number, because the mean of its divisors is an integer number (106015006155).

Almost surely, 2^212030012309 is an apocalyptic number.

It is an amenable number.

212030012309 is a deficient number, since it is larger than the sum of its proper divisors (1).

212030012309 is an equidigital number, since it uses as much as digits as its factorization.

212030012309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 212030012309 in words is "two hundred twelve billion, thirty million, twelve thousand, three hundred nine".