9221019961 has 2 divisors, whose sum is σ = 9221019962. Its totient is φ = 9221019960.

The previous prime is 9221019943. The next prime is 9221020001. The reversal of 9221019961 is 1699101229.

9221019961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (9221020001) can be obtained adding 9221019961 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6475259961 + 2745760000 = 80469^2 + 52400^2 .

It is a cyclic number.

It is not a de Polignac number, because 9221019961 - 2⁷ = 9221019833 is a prime.

It is not a weakly prime, because it can be changed into another prime (9221019901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4610509980 + 4610509981.

It is an arithmetic number, because the mean of its divisors is an integer number (4610509981).

Almost surely, 2^9221019961 is an apocalyptic number.

It is an amenable number.

9221019961 is a deficient number, since it is larger than the sum of its proper divisors (1).

9221019961 is an equidigital number, since it uses as much as digits as its factorization.

9221019961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 9221019961 is about 96026.1420707924. The cubic root of 9221019961 is about 2096.9737181338.

The spelling of 9221019961 in words is "nine billion, two hundred twenty-one million, nineteen thousand, nine hundred sixty-one".