212103322309 has 4 divisors (see below), whose sum is σ = 212104431616. Its totient is φ = 212102213004.

The previous prime is 212103322267. The next prime is 212103322313. The reversal of 212103322309 is 903223301212.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 212103322309 - 2²¹ = 212101225157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212103322339) 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, 186309 + ... + 677434.

It is an arithmetic number, because the mean of its divisors is an integer number (53026107904).

Almost surely, 2^212103322309 is an apocalyptic number.

It is an amenable number.

212103322309 is a deficient number, since it is larger than the sum of its proper divisors (1109307).

212103322309 is an equidigital number, since it uses as much as digits as its factorization.

212103322309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109306.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 212103322309 in words is "two hundred twelve billion, one hundred three million, three hundred twenty-two thousand, three hundred nine".