12021101987 has 2 divisors, whose sum is σ = 12021101988. Its totient is φ = 12021101986.

The previous prime is 12021101959. The next prime is 12021101993. The reversal of 12021101987 is 78910112021.

12021101987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12021101987 - 2¹⁸ = 12020839843 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021101927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010550993 + 6010550994.

It is an arithmetic number, because the mean of its divisors is an integer number (6010550994).

Almost surely, 2^12021101987 is an apocalyptic number.

12021101987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021101987 is an equidigital number, since it uses as much as digits as its factorization.

12021101987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 32.

The spelling of 12021101987 in words is "twelve billion, twenty-one million, one hundred one thousand, nine hundred eighty-seven".