2233212221 has 2 divisors, whose sum is σ = 2233212222. Its totient is φ = 2233212220.

The previous prime is 2233212217. The next prime is 2233212227. The reversal of 2233212221 is 1222123322.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1908816100 + 324396121 = 43690^2 + 18011^2 .

It is a cyclic number.

It is not a de Polignac number, because 2233212221 - 2² = 2233212217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2233212193 and 2233212202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2233212227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1116606110 + 1116606111.

It is an arithmetic number, because the mean of its divisors is an integer number (1116606111).

Almost surely, 2^2233212221 is an apocalyptic number.

It is an amenable number.

2233212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2233212221 is an equidigital number, since it uses as much as digits as its factorization.

2233212221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 20.

The square root of 2233212221 is about 47256.8748543532. The cubic root of 2233212221 is about 1307.1035633456.

Adding to 2233212221 its reverse (1222123322), we get a palindrome (3455335543).

The spelling of 2233212221 in words is "two billion, two hundred thirty-three million, two hundred twelve thousand, two hundred twenty-one".