12211999758877 has 2 divisors, whose sum is σ = 12211999758878. Its totient is φ = 12211999758876.

The previous prime is 12211999758859. The next prime is 12211999758887. The reversal of 12211999758877 is 77885799911221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12197793741156 + 14206017721 = 3492534^2 + 119189^2 .

It is an emirp because it is prime and its reverse (77885799911221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12211999758877 is a prime.

It is a super-2 number, since 2×12211999758877² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211999758857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105999879438 + 6105999879439.

It is an arithmetic number, because the mean of its divisors is an integer number (6105999879439).

Almost surely, 2^{12211999758877} is an apocalyptic number.

It is an amenable number.

12211999758877 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211999758877 is an equidigital number, since it uses as much as digits as its factorization.

12211999758877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 320060160, while the sum is 76.

The spelling of 12211999758877 in words is "twelve trillion, two hundred eleven billion, nine hundred ninety-nine million, seven hundred fifty-eight thousand, eight hundred seventy-seven".