121012201987 has 2 divisors, whose sum is σ = 121012201988. Its totient is φ = 121012201986.

The previous prime is 121012201949. The next prime is 121012201993. The reversal of 121012201987 is 789102210121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121012201987 - 2⁷ = 121012201859 is a prime.

It is not a weakly prime, because it can be changed into another prime (121012201907) 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, 60506100993 + 60506100994.

It is an arithmetic number, because the mean of its divisors is an integer number (60506100994).

Almost surely, 2^121012201987 is an apocalyptic number.

121012201987 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012201987 is an equidigital number, since it uses as much as digits as its factorization.

121012201987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 121012201987 in words is "one hundred twenty-one billion, twelve million, two hundred one thousand, nine hundred eighty-seven".