2123213433221 has 8 divisors (see below), whose sum is σ = 2129610451584. Its totient is φ = 2116823641920.

The previous prime is 2123213433197. The next prime is 2123213433277. The reversal of 2123213433221 is 1223343123212.

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 2123213433221 - 2⁶ = 2123213433157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123213433521) 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, 1218020 + ... + 2393741.

It is an arithmetic number, because the mean of its divisors is an integer number (266201306448).

Almost surely, 2^{2123213433221} is an apocalyptic number.

It is an amenable number.

2123213433221 is a deficient number, since it is larger than the sum of its proper divisors (6397018363).

2123213433221 is a wasteful number, since it uses less digits than its factorization.

2123213433221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613531.

The product of its digits is 10368, while the sum is 29.

Adding to 2123213433221 its reverse (1223343123212), we get a palindrome (3346556556433).

The spelling of 2123213433221 in words is "two trillion, one hundred twenty-three billion, two hundred thirteen million, four hundred thirty-three thousand, two hundred twenty-one".