122012257 has 2 divisors, whose sum is σ = 122012258. Its totient is φ = 122012256.

The previous prime is 122012197. The next prime is 122012279. The reversal of 122012257 is 752210221.

It is an a-pointer prime, because the next prime (122012279) can be obtained adding 122012257 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104673361 + 17338896 = 10231^2 + 4164^2 .

It is a cyclic number.

It is not a de Polignac number, because 122012257 - 2¹¹ = 122010209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122012287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61006128 + 61006129.

It is an arithmetic number, because the mean of its divisors is an integer number (61006129).

Almost surely, 2^122012257 is an apocalyptic number.

It is an amenable number.

122012257 is a deficient number, since it is larger than the sum of its proper divisors (1).

122012257 is an equidigital number, since it uses as much as digits as its factorization.

122012257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 122012257 is about 11045.9158515716. The cubic root of 122012257 is about 495.9841753211.

Adding to 122012257 its reverse (752210221), we get a palindrome (874222478).

The spelling of 122012257 in words is "one hundred twenty-two million, twelve thousand, two hundred fifty-seven".