221330996146697 has 2 divisors, whose sum is σ = 221330996146698. Its totient is φ = 221330996146696.

The previous prime is 221330996146669. The next prime is 221330996146811. The reversal of 221330996146697 is 796641699033122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216513449644816 + 4817546501881 = 14714396^2 + 2194891^2 .

It is a cyclic number.

It is not a de Polignac number, because 221330996146697 - 2⁴⁰ = 220231484518921 is a prime.

It is not a weakly prime, because it can be changed into another prime (221330996140697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110665498073348 + 110665498073349.

It is an arithmetic number, because the mean of its divisors is an integer number (110665498073349).

Almost surely, 2^{221330996146697} is an apocalyptic number.

It is an amenable number.

221330996146697 is a deficient number, since it is larger than the sum of its proper divisors (1).

221330996146697 is an equidigital number, since it uses as much as digits as its factorization.

221330996146697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158723712, while the sum is 68.

The spelling of 221330996146697 in words is "two hundred twenty-one trillion, three hundred thirty billion, nine hundred ninety-six million, one hundred forty-six thousand, six hundred ninety-seven".