9798901121 has 2 divisors, whose sum is σ = 9798901122. Its totient is φ = 9798901120.

The previous prime is 9798901111. The next prime is 9798901127. The reversal of 9798901121 is 1211098979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9533569600 + 265331521 = 97640^2 + 16289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9798901121 is a prime.

It is not a weakly prime, because it can be changed into another prime (9798901127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4899450560 + 4899450561.

It is an arithmetic number, because the mean of its divisors is an integer number (4899450561).

Almost surely, 2^9798901121 is an apocalyptic number.

It is an amenable number.

9798901121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9798901121 is an equidigital number, since it uses as much as digits as its factorization.

9798901121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 47.

The square root of 9798901121 is about 98989.3990334319. The cubic root of 9798901121 is about 2139.8949726456.

The spelling of 9798901121 in words is "nine billion, seven hundred ninety-eight million, nine hundred one thousand, one hundred twenty-one".