12213213277 has 2 divisors, whose sum is σ = 12213213278. Its totient is φ = 12213213276.

The previous prime is 12213213217. The next prime is 12213213289. The reversal of 12213213277 is 77231231221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7812084996 + 4401128281 = 88386^2 + 66341^2 .

It is a cyclic number.

It is not a de Polignac number, because 12213213277 - 2²⁷ = 12078995549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12213213217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106606638 + 6106606639.

It is an arithmetic number, because the mean of its divisors is an integer number (6106606639).

Almost surely, 2^12213213277 is an apocalyptic number.

It is an amenable number.

12213213277 is a deficient number, since it is larger than the sum of its proper divisors (1).

12213213277 is an equidigital number, since it uses as much as digits as its factorization.

12213213277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 31.

Adding to 12213213277 its reverse (77231231221), we get a palindrome (89444444498).

The spelling of 12213213277 in words is "twelve billion, two hundred thirteen million, two hundred thirteen thousand, two hundred seventy-seven".