21010122102097 has 2 divisors, whose sum is σ = 21010122102098. Its totient is φ = 21010122102096.

The previous prime is 21010122102077. The next prime is 21010122102133. The reversal of 21010122102097 is 79020122101012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20016174915136 + 993947186961 = 4473944^2 + 996969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010122102097 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010122102037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505061051048 + 10505061051049.

It is an arithmetic number, because the mean of its divisors is an integer number (10505061051049).

Almost surely, 2^{21010122102097} is an apocalyptic number.

It is an amenable number.

21010122102097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010122102097 is an equidigital number, since it uses as much as digits as its factorization.

21010122102097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The spelling of 21010122102097 in words is "twenty-one trillion, ten billion, one hundred twenty-two million, one hundred two thousand, ninety-seven".