121221101009699 has 2 divisors, whose sum is σ = 121221101009700. Its totient is φ = 121221101009698.

The previous prime is 121221101009689. The next prime is 121221101009713. The reversal of 121221101009699 is 996900101122121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221101009699 is a prime.

It is not a weakly prime, because it can be changed into another prime (121221101009609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610550504849 + 60610550504850.

It is an arithmetic number, because the mean of its divisors is an integer number (60610550504850).

Almost surely, 2^{121221101009699} is an apocalyptic number.

121221101009699 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221101009699 is an equidigital number, since it uses as much as digits as its factorization.

121221101009699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 44.

The spelling of 121221101009699 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred one million, nine thousand, six hundred ninety-nine".