213203041421 has 4 divisors (see below), whose sum is σ = 218403115644. Its totient is φ = 208002967200.

The previous prime is 213203041393. The next prime is 213203041463. The reversal of 213203041421 is 124140302312.

213203041421 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 59804702500 + 153398338921 = 244550^2 + 391661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213203041421 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 (213203041721) 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, 2600037050 + ... + 2600037131.

It is an arithmetic number, because the mean of its divisors is an integer number (54600778911).

Almost surely, 2^213203041421 is an apocalyptic number.

It is an amenable number.

213203041421 is a deficient number, since it is larger than the sum of its proper divisors (5200074223).

213203041421 is an equidigital number, since it uses as much as digits as its factorization.

213203041421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200074222.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 213203041421 its reverse (124140302312), we get a palindrome (337343343733).

The spelling of 213203041421 in words is "two hundred thirteen billion, two hundred three million, forty-one thousand, four hundred twenty-one".