99222001 has 2 divisors, whose sum is σ = 99222002. Its totient is φ = 99222000.

The previous prime is 99221999. The next prime is 99222031. The reversal of 99222001 is 10022299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86936976 + 12285025 = 9324^2 + 3505^2 .

It is a cyclic number.

It is not a de Polignac number, because 99222001 - 2¹ = 99221999 is a prime.

Together with 99221999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (99222031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49611000 + 49611001.

It is an arithmetic number, because the mean of its divisors is an integer number (49611001).

Almost surely, 2^99222001 is an apocalyptic number.

It is an amenable number.

99222001 is a deficient number, since it is larger than the sum of its proper divisors (1).

99222001 is an equidigital number, since it uses as much as digits as its factorization.

99222001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 99222001 is about 9961.0240939373. The cubic root of 99222001 is about 462.9520310057.

The spelling of 99222001 in words is "ninety-nine million, two hundred twenty-two thousand, one".