12211021021187 has 2 divisors, whose sum is σ = 12211021021188. Its totient is φ = 12211021021186.

The previous prime is 12211021021163. The next prime is 12211021021229. The reversal of 12211021021187 is 78112012011221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12211021021187 is a prime.

It is not a weakly prime, because it can be changed into another prime (12211021021387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105510510593 + 6105510510594.

It is an arithmetic number, because the mean of its divisors is an integer number (6105510510594).

Almost surely, 2^{12211021021187} is an apocalyptic number.

12211021021187 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211021021187 is an equidigital number, since it uses as much as digits as its factorization.

12211021021187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 29.

The spelling of 12211021021187 in words is "twelve trillion, two hundred eleven billion, twenty-one million, twenty-one thousand, one hundred eighty-seven".