212403412209 has 4 divisors (see below), whose sum is σ = 283204549616. Its totient is φ = 141602274804.

The previous prime is 212403412201. The next prime is 212403412217. The reversal of 212403412209 is 902214304212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (212403412201) and next prime (212403412217).

It is not a de Polignac number, because 212403412209 - 2³ = 212403412201 is a prime.

It is a super-3 number, since 3×212403412209³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212403412201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35400568699 + ... + 35400568704.

It is an arithmetic number, because the mean of its divisors is an integer number (70801137404).

Almost surely, 2^212403412209 is an apocalyptic number.

It is an amenable number.

212403412209 is a deficient number, since it is larger than the sum of its proper divisors (70801137407).

212403412209 is an equidigital number, since it uses as much as digits as its factorization.

212403412209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70801137406.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 212403412209 in words is "two hundred twelve billion, four hundred three million, four hundred twelve thousand, two hundred nine".