12443211377 has 2 divisors, whose sum is σ = 12443211378. Its totient is φ = 12443211376.

The previous prime is 12443211373. The next prime is 12443211379. The reversal of 12443211377 is 77311234421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10173546496 + 2269664881 = 100864^2 + 47641^2 .

It is a cyclic number.

It is not a de Polignac number, because 12443211377 - 2² = 12443211373 is a prime.

It is a super-2 number, since 2×12443211377² (a number of 21 digits) contains 22 as substring.

Together with 12443211379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12443211373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221605688 + 6221605689.

It is an arithmetic number, because the mean of its divisors is an integer number (6221605689).

Almost surely, 2^12443211377 is an apocalyptic number.

It is an amenable number.

12443211377 is a deficient number, since it is larger than the sum of its proper divisors (1).

12443211377 is an equidigital number, since it uses as much as digits as its factorization.

12443211377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 35.

Adding to 12443211377 its reverse (77311234421), we get a palindrome (89754445798).

The spelling of 12443211377 in words is "twelve billion, four hundred forty-three million, two hundred eleven thousand, three hundred seventy-seven".