99020212112221 has 2 divisors, whose sum is σ = 99020212112222. Its totient is φ = 99020212112220.

The previous prime is 99020212112183. The next prime is 99020212112281. The reversal of 99020212112221 is 12221121202099.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98846644887225 + 173567224996 = 9942165^2 + 416614^2 .

It is an emirp because it is prime and its reverse (12221121202099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99020212112221 - 2²³ = 99020203723613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99020212112281) 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, 49510106056110 + 49510106056111.

It is an arithmetic number, because the mean of its divisors is an integer number (49510106056111).

Almost surely, 2^{99020212112221} is an apocalyptic number.

It is an amenable number.

99020212112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

99020212112221 is an equidigital number, since it uses as much as digits as its factorization.

99020212112221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 99020212112221 in words is "ninety-nine trillion, twenty billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty-one".