12220121122277 has 2 divisors, whose sum is σ = 12220121122278. Its totient is φ = 12220121122276.

The previous prime is 12220121122189. The next prime is 12220121122283. The reversal of 12220121122277 is 77222112102221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11260816449796 + 959304672481 = 3355714^2 + 979441^2 .

It is an emirp because it is prime and its reverse (77222112102221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12220121122277 - 2¹⁰ = 12220121121253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12220121122877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110060561138 + 6110060561139.

It is an arithmetic number, because the mean of its divisors is an integer number (6110060561139).

Almost surely, 2^{12220121122277} is an apocalyptic number.

It is an amenable number.

12220121122277 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220121122277 is an equidigital number, since it uses as much as digits as its factorization.

12220121122277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 32.

Adding to 12220121122277 its reverse (77222112102221), we get a palindrome (89442233224498).

The spelling of 12220121122277 in words is "twelve trillion, two hundred twenty billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred seventy-seven".