9999928647211 has 2 divisors, whose sum is σ = 9999928647212. Its totient is φ = 9999928647210.

The previous prime is 9999928647161. The next prime is 9999928647263. The reversal of 9999928647211 is 1127468299999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9999928647211 - 2⁹ = 9999928646699 is a prime.

It is a super-2 number, since 2×9999928647211² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9999928647811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999964323605 + 4999964323606.

It is an arithmetic number, because the mean of its divisors is an integer number (4999964323606).

Almost surely, 2^{9999928647211} is an apocalyptic number.

9999928647211 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999928647211 is an equidigital number, since it uses as much as digits as its factorization.

9999928647211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317447424, while the sum is 76.

The spelling of 9999928647211 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred twenty-eight million, six hundred forty-seven thousand, two hundred eleven".