98911222121 has 2 divisors, whose sum is σ = 98911222122. Its totient is φ = 98911222120.

The previous prime is 98911222117. The next prime is 98911222141. The reversal of 98911222121 is 12122211989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98196996496 + 714225625 = 313364^2 + 26725^2 .

It is an emirp because it is prime and its reverse (12122211989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98911222121 - 2² = 98911222117 is a prime.

It is a super-5 number, since 5×98911222121⁵ (a number of 56 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (98911222141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49455611060 + 49455611061.

It is an arithmetic number, because the mean of its divisors is an integer number (49455611061).

Almost surely, 2^98911222121 is an apocalyptic number.

It is an amenable number.

98911222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

98911222121 is an equidigital number, since it uses as much as digits as its factorization.

98911222121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 38.

The spelling of 98911222121 in words is "ninety-eight billion, nine hundred eleven million, two hundred twenty-two thousand, one hundred twenty-one".