2132222221 has 2 divisors, whose sum is σ = 2132222222. Its totient is φ = 2132222220.

The previous prime is 2132222219. The next prime is 2132222233. The reversal of 2132222221 is 1222222312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1727649225 + 404572996 = 41565^2 + 20114^2 .

It is a cyclic number.

It is not a de Polignac number, because 2132222221 - 2¹ = 2132222219 is a prime.

Together with 2132222219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2132222621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1066111110 + 1066111111.

It is an arithmetic number, because the mean of its divisors is an integer number (1066111111).

Almost surely, 2^2132222221 is an apocalyptic number.

It is an amenable number.

2132222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2132222221 is an equidigital number, since it uses as much as digits as its factorization.

2132222221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 19.

The square root of 2132222221 is about 46175.9918247567. The cubic root of 2132222221 is about 1287.0956475031.

Adding to 2132222221 its reverse (1222222312), we get a palindrome (3354444533).

Subtracting from 2132222221 its reverse (1222222312), we obtain a palindrome (909999909).

The spelling of 2132222221 in words is "two billion, one hundred thirty-two million, two hundred twenty-two thousand, two hundred twenty-one".