213052535221 has 4 divisors (see below), whose sum is σ = 216663595200. Its totient is φ = 209441475244.

The previous prime is 213052535191. The next prime is 213052535231. The reversal of 213052535221 is 122535250312.

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 a cyclic number.

It is not a de Polignac number, because 213052535221 - 2²³ = 213044146613 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 (213052535231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1805529901 + ... + 1805530018.

It is an arithmetic number, because the mean of its divisors is an integer number (54165898800).

Almost surely, 2^213052535221 is an apocalyptic number.

It is an amenable number.

213052535221 is a deficient number, since it is larger than the sum of its proper divisors (3611059979).

213052535221 is an equidigital number, since it uses as much as digits as its factorization.

213052535221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611059978.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 213052535221 its reverse (122535250312), we get a palindrome (335587785533).

The spelling of 213052535221 in words is "two hundred thirteen billion, fifty-two million, five hundred thirty-five thousand, two hundred twenty-one".