213133212321 has 8 divisors (see below), whose sum is σ = 285524430624. Its totient is φ = 141415401120.

The previous prime is 213133212317. The next prime is 213133212337. The reversal of 213133212321 is 123212331312.

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

It is not a de Polignac number, because 213133212321 - 2² = 213133212317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213133212291 and 213133212300.

It is not an unprimeable number, because it can be changed into a prime (213133212301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168351036 + ... + 168352301.

It is an arithmetic number, because the mean of its divisors is an integer number (35690553828).

Almost surely, 2^213133212321 is an apocalyptic number.

It is an amenable number.

213133212321 is a deficient number, since it is larger than the sum of its proper divisors (72391218303).

213133212321 is a wasteful number, since it uses less digits than its factorization.

213133212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336703551.

The product of its digits is 1296, while the sum is 24.

Adding to 213133212321 its reverse (123212331312), we get a palindrome (336345543633).

The spelling of 213133212321 in words is "two hundred thirteen billion, one hundred thirty-three million, two hundred twelve thousand, three hundred twenty-one".