12211633691 has 2 divisors, whose sum is σ = 12211633692. Its totient is φ = 12211633690.

The previous prime is 12211633657. The next prime is 12211633747. The reversal of 12211633691 is 19633611221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12211633691 - 2⁶ = 12211633627 is a prime.

It is not a weakly prime, because it can be changed into another prime (12211633631) 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, 6105816845 + 6105816846.

It is an arithmetic number, because the mean of its divisors is an integer number (6105816846).

Almost surely, 2^12211633691 is an apocalyptic number.

12211633691 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211633691 is an equidigital number, since it uses as much as digits as its factorization.

12211633691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The spelling of 12211633691 in words is "twelve billion, two hundred eleven million, six hundred thirty-three thousand, six hundred ninety-one".