213021221133 has 8 divisors (see below), whose sum is σ = 324603765568. Its totient is φ = 121726412064.

The previous prime is 213021221131. The next prime is 213021221167. The reversal of 213021221133 is 331122120312.

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

It is not a de Polignac number, because 213021221133 - 2¹ = 213021221131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10143867673 = 213021221133 / (2 + 1 + 3 + 0 + 2 + 1 + 2 + 2 + 1 + 1 + 3 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213021221131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5071933816 + ... + 5071933857.

It is an arithmetic number, because the mean of its divisors is an integer number (40575470696).

Almost surely, 2^213021221133 is an apocalyptic number.

It is an amenable number.

213021221133 is a deficient number, since it is larger than the sum of its proper divisors (111582544435).

213021221133 is a wasteful number, since it uses less digits than its factorization.

213021221133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10143867683.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213021221133 its reverse (331122120312), we get a palindrome (544143341445).

The spelling of 213021221133 in words is "two hundred thirteen billion, twenty-one million, two hundred twenty-one thousand, one hundred thirty-three".