12221111057 has 2 divisors, whose sum is σ = 12221111058. Its totient is φ = 12221111056.

The previous prime is 12221111027. The next prime is 12221111069. The reversal of 12221111057 is 75011112221.

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., 10446679681 + 1774431376 = 102209^2 + 42124^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221111057 - 2¹⁴ = 12221094673 is a prime.

It is not a weakly prime, because it can be changed into another prime (12221111017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110555528 + 6110555529.

It is an arithmetic number, because the mean of its divisors is an integer number (6110555529).

Almost surely, 2^12221111057 is an apocalyptic number.

It is an amenable number.

12221111057 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221111057 is an equidigital number, since it uses as much as digits as its factorization.

12221111057 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 23.

Adding to 12221111057 its reverse (75011112221), we get a palindrome (87232223278).

The spelling of 12221111057 in words is "twelve billion, two hundred twenty-one million, one hundred eleven thousand, fifty-seven".