12221020111277 has 2 divisors, whose sum is σ = 12221020111278. Its totient is φ = 12221020111276.

The previous prime is 12221020111177. The next prime is 12221020111297. The reversal of 12221020111277 is 77211102012221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10983828842596 + 1237191268681 = 3314186^2 + 1112291^2 .

It is an emirp because it is prime and its reverse (77211102012221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12221020111277 - 2⁸ = 12221020111021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221020111297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110510055638 + 6110510055639.

It is an arithmetic number, because the mean of its divisors is an integer number (6110510055639).

Almost surely, 2^{12221020111277} is an apocalyptic number.

It is an amenable number.

12221020111277 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221020111277 is an equidigital number, since it uses as much as digits as its factorization.

12221020111277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 29.

Adding to 12221020111277 its reverse (77211102012221), we get a palindrome (89432122123498).

The spelling of 12221020111277 in words is "twelve trillion, two hundred twenty-one billion, twenty million, one hundred eleven thousand, two hundred seventy-seven".