899902212002221 has 2 divisors, whose sum is σ = 899902212002222. Its totient is φ = 899902212002220.

The previous prime is 899902212002219. The next prime is 899902212002333. The reversal of 899902212002221 is 122200212209998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 899796671485321 + 105540516900 = 29996611^2 + 324870^2 .

It is a cyclic number.

It is not a de Polignac number, because 899902212002221 - 2¹ = 899902212002219 is a prime.

Together with 899902212002219, 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 (899902212002821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449951106001110 + 449951106001111.

It is an arithmetic number, because the mean of its divisors is an integer number (449951106001111).

Almost surely, 2^{899902212002221} is an apocalyptic number.

It is an amenable number.

899902212002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

899902212002221 is an equidigital number, since it uses as much as digits as its factorization.

899902212002221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 49.

The spelling of 899902212002221 in words is "eight hundred ninety-nine trillion, nine hundred two billion, two hundred twelve million, two thousand, two hundred twenty-one".