9901010121097 has 2 divisors, whose sum is σ = 9901010121098. Its totient is φ = 9901010121096.

The previous prime is 9901010121073. The next prime is 9901010121133. The reversal of 9901010121097 is 7901210101099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9460613307721 + 440396813376 = 3075811^2 + 663624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9901010121097 is a prime.

It is not a weakly prime, because it can be changed into another prime (9901010121047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950505060548 + 4950505060549.

It is an arithmetic number, because the mean of its divisors is an integer number (4950505060549).

Almost surely, 2^{9901010121097} is an apocalyptic number.

It is an amenable number.

9901010121097 is a deficient number, since it is larger than the sum of its proper divisors (1).

9901010121097 is an equidigital number, since it uses as much as digits as its factorization.

9901010121097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 40.

The spelling of 9901010121097 in words is "nine trillion, nine hundred one billion, ten million, one hundred twenty-one thousand, ninety-seven".