212012221022209 has 4 divisors (see below), whose sum is σ = 212012432879616. Its totient is φ = 212012009164804.

The previous prime is 212012221022179. The next prime is 212012221022219. The reversal of 212012221022209 is 902220122210212.

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 a cyclic number.

It is not a de Polignac number, because 212012221022209 - 2¹⁵ = 212012220989441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212012221022219) 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, 104420449 + ... + 106431454.

It is an arithmetic number, because the mean of its divisors is an integer number (53003108219904).

Almost surely, 2^{212012221022209} is an apocalyptic number.

It is an amenable number.

212012221022209 is a deficient number, since it is larger than the sum of its proper divisors (211857407).

212012221022209 is a wasteful number, since it uses less digits than its factorization.

212012221022209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211857406.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 212012221022209 in words is "two hundred twelve trillion, twelve billion, two hundred twenty-one million, twenty-two thousand, two hundred nine".