213311121 has 8 divisors (see below), whose sum is σ = 301145184. Its totient is φ = 133842240.

The previous prime is 213311113. The next prime is 213311143. The reversal of 213311121 is 121113312.

It is a happy number.

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

It is not a de Polignac number, because 213311121 - 2³ = 213311113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213311121.

It is not an unprimeable number, because it can be changed into a prime (213311101) 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, 2091235 + ... + 2091336.

It is an arithmetic number, because the mean of its divisors is an integer number (37643148).

Almost surely, 2^213311121 is an apocalyptic number.

It is an amenable number.

213311121 is a deficient number, since it is larger than the sum of its proper divisors (87834063).

213311121 is a wasteful number, since it uses less digits than its factorization.

213311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182591.

The product of its digits is 36, while the sum is 15.

The square root of 213311121 is about 14605.1744597591. The cubic root of 213311121 is about 597.4998941428.

Adding to 213311121 its reverse (121113312), we get a palindrome (334424433).

The spelling of 213311121 in words is "two hundred thirteen million, three hundred eleven thousand, one hundred twenty-one".