12221057 has 2 divisors, whose sum is σ = 12221058. Its totient is φ = 12221056.

The previous prime is 12221039. The next prime is 12221071. The reversal of 12221057 is 75012221.

12221057 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., 7376656 + 4844401 = 2716^2 + 2201^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221057 - 2¹⁸ = 11958913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12221087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110528 + 6110529.

It is an arithmetic number, because the mean of its divisors is an integer number (6110529).

Almost surely, 2^12221057 is an apocalyptic number.

It is an amenable number.

12221057 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221057 is an equidigital number, since it uses as much as digits as its factorization.

12221057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 12221057 is about 3495.8628405588. The cubic root of 12221057 is about 230.3401206053.

Adding to 12221057 its reverse (75012221), we get a palindrome (87233278).

The spelling of 12221057 in words is "twelve million, two hundred twenty-one thousand, fifty-seven".