222420032221 has 2 divisors, whose sum is σ = 222420032222. Its totient is φ = 222420032220.

The previous prime is 222420032213. The next prime is 222420032249. The reversal of 222420032221 is 122230024222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209466405625 + 12953626596 = 457675^2 + 113814^2 .

It is a cyclic number.

It is not a de Polignac number, because 222420032221 - 2³ = 222420032213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222420032192 and 222420032201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222420030221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111210016110 + 111210016111.

It is an arithmetic number, because the mean of its divisors is an integer number (111210016111).

Almost surely, 2^222420032221 is an apocalyptic number.

It is an amenable number.

222420032221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222420032221 is an equidigital number, since it uses as much as digits as its factorization.

222420032221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 222420032221 its reverse (122230024222), we get a palindrome (344650056443).

The spelling of 222420032221 in words is "two hundred twenty-two billion, four hundred twenty million, thirty-two thousand, two hundred twenty-one".