212003112509 has 2 divisors, whose sum is σ = 212003112510. Its totient is φ = 212003112508.

The previous prime is 212003112401. The next prime is 212003112527. The reversal of 212003112509 is 905211300212.

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., 206663887609 + 5339224900 = 454603^2 + 73070^2 .

It is a cyclic number.

It is not a de Polignac number, because 212003112509 - 2¹² = 212003108413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212003112589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106001556254 + 106001556255.

It is an arithmetic number, because the mean of its divisors is an integer number (106001556255).

Almost surely, 2^212003112509 is an apocalyptic number.

It is an amenable number.

212003112509 is a deficient number, since it is larger than the sum of its proper divisors (1).

212003112509 is an equidigital number, since it uses as much as digits as its factorization.

212003112509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The spelling of 212003112509 in words is "two hundred twelve billion, three million, one hundred twelve thousand, five hundred nine".