12220277 has 2 divisors, whose sum is σ = 12220278. Its totient is φ = 12220276.

The previous prime is 12220267. The next prime is 12220301. The reversal of 12220277 is 77202221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8708401 + 3511876 = 2951^2 + 1874^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220277 - 2⁴ = 12220261 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12220217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110138 + 6110139.

It is an arithmetic number, because the mean of its divisors is an integer number (6110139).

Almost surely, 2^12220277 is an apocalyptic number.

It is an amenable number.

12220277 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220277 is an equidigital number, since it uses as much as digits as its factorization.

12220277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 12220277 is about 3495.7512783377. The cubic root of 12220277 is about 230.3352200713.

Adding to 12220277 its reverse (77202221), we get a palindrome (89422498).

The spelling of 12220277 in words is "twelve million, two hundred twenty thousand, two hundred seventy-seven".