212301223021 has 4 divisors (see below), whose sum is σ = 212312985372. Its totient is φ = 212289460672.

The previous prime is 212301222997. The next prime is 212301223031. The reversal of 212301223021 is 120322103212.

212301223021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 194767755625 + 17533467396 = 441325^2 + 132414^2 .

It is a cyclic number.

It is not a de Polignac number, because 212301223021 - 2⁵ = 212301222989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212301223021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212301223031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5854060 + ... + 5890213.

It is an arithmetic number, because the mean of its divisors is an integer number (53078246343).

Almost surely, 2^212301223021 is an apocalyptic number.

It is an amenable number.

212301223021 is a deficient number, since it is larger than the sum of its proper divisors (11762351).

212301223021 is a wasteful number, since it uses less digits than its factorization.

212301223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11762350.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212301223021 its reverse (120322103212), we get a palindrome (332623326233).

The spelling of 212301223021 in words is "two hundred twelve billion, three hundred one million, two hundred twenty-three thousand, twenty-one".