213230002221021 has 4 divisors (see below), whose sum is σ = 284306669628032. Its totient is φ = 142153334814012.

The previous prime is 213230002221013. The next prime is 213230002221053. The reversal of 213230002221021 is 120122200032312.

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 213230002221021 - 2³ = 213230002221013 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 (213230002221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35538333703501 + ... + 35538333703506.

It is an arithmetic number, because the mean of its divisors is an integer number (71076667407008).

Almost surely, 2^{213230002221021} is an apocalyptic number.

It is an amenable number.

213230002221021 is a deficient number, since it is larger than the sum of its proper divisors (71076667407011).

213230002221021 is an equidigital number, since it uses as much as digits as its factorization.

213230002221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71076667407010.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 213230002221021 its reverse (120122200032312), we get a palindrome (333352202253333).

The spelling of 213230002221021 in words is "two hundred thirteen trillion, two hundred thirty billion, two million, two hundred twenty-one thousand, twenty-one".