211221120964747 has 2 divisors, whose sum is σ = 211221120964748. Its totient is φ = 211221120964746.

The previous prime is 211221120964739. The next prime is 211221120964753. The reversal of 211221120964747 is 747469021122112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211221120964747 - 2³ = 211221120964739 is a prime.

It is a super-2 number, since 2×211221120964747² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211221120964747.

It is not a weakly prime, because it can be changed into another prime (211221120964717) 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, 105610560482373 + 105610560482374.

It is an arithmetic number, because the mean of its divisors is an integer number (105610560482374).

Almost surely, 2^{211221120964747} is an apocalyptic number.

211221120964747 is a deficient number, since it is larger than the sum of its proper divisors (1).

211221120964747 is an equidigital number, since it uses as much as digits as its factorization.

211221120964747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 211221120964747 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred twenty million, nine hundred sixty-four thousand, seven hundred forty-seven".