99943321213 has 2 divisors, whose sum is σ = 99943321214. Its totient is φ = 99943321212.

The previous prime is 99943321211. The next prime is 99943321271. The reversal of 99943321213 is 31212334999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78712791364 + 21230529849 = 280558^2 + 145707^2 .

It is a cyclic number.

It is not a de Polignac number, because 99943321213 - 2¹ = 99943321211 is a prime.

Together with 99943321211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99943321211) 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, 49971660606 + 49971660607.

It is an arithmetic number, because the mean of its divisors is an integer number (49971660607).

Almost surely, 2^99943321213 is an apocalyptic number.

It is an amenable number.

99943321213 is a deficient number, since it is larger than the sum of its proper divisors (1).

99943321213 is an equidigital number, since it uses as much as digits as its factorization.

99943321213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 46.

The spelling of 99943321213 in words is "ninety-nine billion, nine hundred forty-three million, three hundred twenty-one thousand, two hundred thirteen".