121112110121987 has 2 divisors, whose sum is σ = 121112110121988. Its totient is φ = 121112110121986.

The previous prime is 121112110121941. The next prime is 121112110122023. The reversal of 121112110121987 is 789121011211121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121112110121987 - 2⁸ = 121112110121731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121112110121987.

It is not a weakly prime, because it can be changed into another prime (121112110121927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60556055060993 + 60556055060994.

It is an arithmetic number, because the mean of its divisors is an integer number (60556055060994).

Almost surely, 2^{121112110121987} is an apocalyptic number.

121112110121987 is a deficient number, since it is larger than the sum of its proper divisors (1).

121112110121987 is an equidigital number, since it uses as much as digits as its factorization.

121112110121987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 38.

The spelling of 121112110121987 in words is "one hundred twenty-one trillion, one hundred twelve billion, one hundred ten million, one hundred twenty-one thousand, nine hundred eighty-seven".