122402221 has 2 divisors, whose sum is σ = 122402222. Its totient is φ = 122402220.

The previous prime is 122402201. The next prime is 122402249. The reversal of 122402221 is 122204221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121660900 + 741321 = 11030^2 + 861^2 .

It is a cyclic number.

It is not a de Polignac number, because 122402221 - 2⁹ = 122401709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122402195 and 122402204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122402201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61201110 + 61201111.

It is an arithmetic number, because the mean of its divisors is an integer number (61201111).

Almost surely, 2^122402221 is an apocalyptic number.

It is an amenable number.

122402221 is a deficient number, since it is larger than the sum of its proper divisors (1).

122402221 is an equidigital number, since it uses as much as digits as its factorization.

122402221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 122402221 is about 11063.5537238267. The cubic root of 122402221 is about 496.5120192267.

Adding to 122402221 its reverse (122204221), we get a palindrome (244606442).

The spelling of 122402221 in words is "one hundred twenty-two million, four hundred two thousand, two hundred twenty-one".