213521021334 has 12 divisors (see below), whose sum is σ = 462628879596. Its totient is φ = 71173673772.

The previous prime is 213521021333. The next prime is 213521021347. The reversal of 213521021334 is 433120125312.

213521021334 is a `hidden beast` number, since 2 + 1 + 3 + 521 + 0 + 2 + 133 + 4 = 666.

213521021334 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 213521021298 and 213521021307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213521021333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5931139464 + ... + 5931139499.

It is an arithmetic number, because the mean of its divisors is an integer number (38552406633).

Almost surely, 2^213521021334 is an apocalyptic number.

213521021334 is an abundant number, since it is smaller than the sum of its proper divisors (249107858262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213521021334 is a wasteful number, since it uses less digits than its factorization.

213521021334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11862278971 (or 11862278968 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 213521021334 its reverse (433120125312), we get a palindrome (646641146646).

The spelling of 213521021334 in words is "two hundred thirteen billion, five hundred twenty-one million, twenty-one thousand, three hundred thirty-four".