213244121 has 8 divisors (see below), whose sum is σ = 215890080. Its totient is φ = 210607488.

The previous prime is 213244117. The next prime is 213244127. The reversal of 213244121 is 121442312.

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 213244121 - 2² = 213244117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213244093 and 213244102.

It is not an unprimeable number, because it can be changed into a prime (213244127) 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, 51050 + ... + 55068.

It is an arithmetic number, because the mean of its divisors is an integer number (26986260).

Almost surely, 2^213244121 is an apocalyptic number.

It is an amenable number.

213244121 is a deficient number, since it is larger than the sum of its proper divisors (2645959).

213244121 is an equidigital number, since it uses as much as digits as its factorization.

213244121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4663.

The product of its digits is 384, while the sum is 20.

The square root of 213244121 is about 14602.8805719967. The cubic root of 213244121 is about 597.4373303084.

Adding to 213244121 its reverse (121442312), we get a palindrome (334686433).

The spelling of 213244121 in words is "two hundred thirteen million, two hundred forty-four thousand, one hundred twenty-one".