2234121221 has 4 divisors (see below), whose sum is σ = 2235171744. Its totient is φ = 2233070700.

The previous prime is 2234121193. The next prime is 2234121223. The reversal of 2234121221 is 1221214322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2234121221 - 2¹⁰ = 2234120197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2234121193 and 2234121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2234121223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522065 + ... + 526326.

It is an arithmetic number, because the mean of its divisors is an integer number (558792936).

Almost surely, 2^2234121221 is an apocalyptic number.

It is an amenable number.

2234121221 is a deficient number, since it is larger than the sum of its proper divisors (1050523).

2234121221 is a wasteful number, since it uses less digits than its factorization.

2234121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050522.

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

The square root of 2234121221 is about 47266.4915241231. The cubic root of 2234121221 is about 1307.2808857927.

Adding to 2234121221 its reverse (1221214322), we get a palindrome (3455335543).

The spelling of 2234121221 in words is "two billion, two hundred thirty-four million, one hundred twenty-one thousand, two hundred twenty-one".