212022021009 has 4 divisors (see below), whose sum is σ = 282696028016. Its totient is φ = 141348014004.

The previous prime is 212022020999. The next prime is 212022021037. The reversal of 212022021009 is 900120220212.

It is a happy number.

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 not a de Polignac number, because 212022021009 - 2⁴ = 212022020993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212022021109) 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, 35337003499 + ... + 35337003504.

It is an arithmetic number, because the mean of its divisors is an integer number (70674007004).

Almost surely, 2^212022021009 is an apocalyptic number.

It is an amenable number.

212022021009 is a deficient number, since it is larger than the sum of its proper divisors (70674007007).

212022021009 is an equidigital number, since it uses as much as digits as its factorization.

212022021009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70674007006.

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 212022021009 in words is "two hundred twelve billion, twenty-two million, twenty-one thousand, nine".