121220019097 has 2 divisors, whose sum is σ = 121220019098. Its totient is φ = 121220019096.

The previous prime is 121220019083. The next prime is 121220019113. The reversal of 121220019097 is 790910022121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110054081536 + 11165937561 = 331744^2 + 105669^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220019097 - 2²³ = 121211630489 is a prime.

It is not a weakly prime, because it can be changed into another prime (121220019397) 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, 60610009548 + 60610009549.

It is an arithmetic number, because the mean of its divisors is an integer number (60610009549).

Almost surely, 2^121220019097 is an apocalyptic number.

It is an amenable number.

121220019097 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220019097 is an equidigital number, since it uses as much as digits as its factorization.

121220019097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The spelling of 121220019097 in words is "one hundred twenty-one billion, two hundred twenty million, nineteen thousand, ninety-seven".