213443111021 has 8 divisors (see below), whose sum is σ = 243944703360. Its totient is φ = 182943948528.

The previous prime is 213443110999. The next prime is 213443111027. The reversal of 213443111021 is 120111344312.

213443111021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213443111021 - 2¹⁴ = 213443094637 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 (213443111027) 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 7 ways as a sum of consecutive naturals, for example, 415166 + ... + 774111.

It is an arithmetic number, because the mean of its divisors is an integer number (30493087920).

Almost surely, 2^213443111021 is an apocalyptic number.

It is an amenable number.

213443111021 is a deficient number, since it is larger than the sum of its proper divisors (30501592339).

213443111021 is a wasteful number, since it uses less digits than its factorization.

213443111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214923.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 213443111021 its reverse (120111344312), we get a palindrome (333554455333).

The spelling of 213443111021 in words is "two hundred thirteen billion, four hundred forty-three million, one hundred eleven thousand, twenty-one".