121210010099 has 2 divisors, whose sum is σ = 121210010100. Its totient is φ = 121210010098.

The previous prime is 121210010087. The next prime is 121210010147. The reversal of 121210010099 is 990010012121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121210010099 is a prime.

It is not a weakly prime, because it can be changed into another prime (121210015099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605005049 + 60605005050.

It is an arithmetic number, because the mean of its divisors is an integer number (60605005050).

Almost surely, 2^121210010099 is an apocalyptic number.

121210010099 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210010099 is an equidigital number, since it uses as much as digits as its factorization.

121210010099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 121210010099 in words is "one hundred twenty-one billion, two hundred ten million, ten thousand, ninety-nine".