213433220121 has 32 divisors (see below), whose sum is σ = 317213798400. Its totient is φ = 126537300480.

The previous prime is 213433220071. The next prime is 213433220123. The reversal of 213433220121 is 121022334312.

213433220121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213433220121 - 2¹⁵ = 213433187353 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213433220091 and 213433220100.

It is not an unprimeable number, because it can be changed into a prime (213433220123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3128745 + ... + 3196233.

It is an arithmetic number, because the mean of its divisors is an integer number (9912931200).

Almost surely, 2^213433220121 is an apocalyptic number.

It is an amenable number.

213433220121 is a deficient number, since it is larger than the sum of its proper divisors (103780578279).

213433220121 is a wasteful number, since it uses less digits than its factorization.

213433220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69589.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 213433220121 its reverse (121022334312), we get a palindrome (334455554433).

The spelling of 213433220121 in words is "two hundred thirteen billion, four hundred thirty-three million, two hundred twenty thousand, one hundred twenty-one".