213641121 has 8 divisors (see below), whose sum is σ = 284982624. Its totient is φ = 142363520.

The previous prime is 213641107. The next prime is 213641123. The reversal of 213641121 is 121146312.

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

It is a cyclic number.

It is not a de Polignac number, because 213641121 - 2²³ = 205252513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213641123) 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, 7536 + ... + 22001.

It is an arithmetic number, because the mean of its divisors is an integer number (35622828).

Almost surely, 2^213641121 is an apocalyptic number.

It is an amenable number.

213641121 is a deficient number, since it is larger than the sum of its proper divisors (71341503).

213641121 is a wasteful number, since it uses less digits than its factorization.

213641121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31951.

The product of its digits is 288, while the sum is 21.

The square root of 213641121 is about 14616.4674596840. The cubic root of 213641121 is about 597.8078533536.

Adding to 213641121 its reverse (121146312), we get a palindrome (334787433).

The spelling of 213641121 in words is "two hundred thirteen million, six hundred forty-one thousand, one hundred twenty-one".