2210120221 has 2 divisors, whose sum is σ = 2210120222.
Its totient is φ = 2210120220.
The previous prime is 2210120201. The next prime is 2210120233. The reversal of 2210120221 is 1220210122.
It is a happy number.
2210120221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 2183225625 + 26894596 = 46725^2 + 5186^2
It is a cyclic number.
It is not a de Polignac number, because 2210120221 - 217 = 2209989149 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2210120201) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105060110 + 1105060111.
It is an arithmetic number, because the mean of its divisors is an integer number (1105060111).
Almost surely, 22210120221 is an apocalyptic number.
It is an amenable number.
2210120221 is a deficient number, since it is larger than the sum of its proper divisors (1).
2210120221 is an equidigital number, since it uses as much as digits as its factorization.
2210120221 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 32, while the sum is 13.
The square root of 2210120221 is about 47011.9157342051.
The cubic root of 2210120221 is about 1302.5826804425.
Adding to 2210120221 its reverse (1220210122), we get a palindrome (3430330343).
The spelling of 2210120221 in words is "two billion, two hundred ten million, one hundred twenty thousand, two hundred twenty-one".