22123032221 has 2 divisors, whose sum is σ = 22123032222. Its totient is φ = 22123032220.

The previous prime is 22123032143. The next prime is 22123032233. The reversal of 22123032221 is 12223032122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20326204900 + 1796827321 = 142570^2 + 42389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22123032221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22123032193 and 22123032202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22123032251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061516110 + 11061516111.

It is an arithmetic number, because the mean of its divisors is an integer number (11061516111).

Almost surely, 2^22123032221 is an apocalyptic number.

It is an amenable number.

22123032221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22123032221 is an equidigital number, since it uses as much as digits as its factorization.

22123032221 is an evil number, because the sum of its binary digits is even.

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

Adding to 22123032221 its reverse (12223032122), we get a palindrome (34346064343).

Subtracting from 22123032221 its reverse (12223032122), we obtain a palindrome (9900000099).

The spelling of 22123032221 in words is "twenty-two billion, one hundred twenty-three million, thirty-two thousand, two hundred twenty-one".