12121099087 has 2 divisors, whose sum is σ = 12121099088. Its totient is φ = 12121099086.

The previous prime is 12121099079. The next prime is 12121099129. The reversal of 12121099087 is 78099012121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12121099087 - 2³ = 12121099079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121099187) 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, 6060549543 + 6060549544.

It is an arithmetic number, because the mean of its divisors is an integer number (6060549544).

Almost surely, 2^12121099087 is an apocalyptic number.

12121099087 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121099087 is an equidigital number, since it uses as much as digits as its factorization.

12121099087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 40.

The spelling of 12121099087 in words is "twelve billion, one hundred twenty-one million, ninety-nine thousand, eighty-seven".