1320121332197 has 2 divisors, whose sum is σ = 1320121332198. Its totient is φ = 1320121332196.

The previous prime is 1320121332181. The next prime is 1320121332347. The reversal of 1320121332197 is 7912331210231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1319847131716 + 274200481 = 1148846^2 + 16559^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320121332197 - 2⁴ = 1320121332181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320121332107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660060666098 + 660060666099.

It is an arithmetic number, because the mean of its divisors is an integer number (660060666099).

Almost surely, 2^{1320121332197} is an apocalyptic number.

It is an amenable number.

1320121332197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320121332197 is an equidigital number, since it uses as much as digits as its factorization.

1320121332197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The spelling of 1320121332197 in words is "one trillion, three hundred twenty billion, one hundred twenty-one million, three hundred thirty-two thousand, one hundred ninety-seven".