21202212111097 has 2 divisors, whose sum is σ = 21202212111098. Its totient is φ = 21202212111096.

The previous prime is 21202212110939. The next prime is 21202212111127. The reversal of 21202212111097 is 79011121220212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10805611521721 + 10396600589376 = 3287189^2 + 3224376^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202212111097 - 2²³ = 21202203722489 is a prime.

It is a super-3 number, since 3×21202212111097³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21202212111497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601106055548 + 10601106055549.

It is an arithmetic number, because the mean of its divisors is an integer number (10601106055549).

Almost surely, 2^{21202212111097} is an apocalyptic number.

It is an amenable number.

21202212111097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202212111097 is an equidigital number, since it uses as much as digits as its factorization.

21202212111097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 21202212111097 in words is "twenty-one trillion, two hundred two billion, two hundred twelve million, one hundred eleven thousand, ninety-seven".