121147916887 has 2 divisors, whose sum is σ = 121147916888. Its totient is φ = 121147916886.

The previous prime is 121147916809. The next prime is 121147916993. The reversal of 121147916887 is 788619741121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121147916887 - 2¹⁵ = 121147884119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128147916887) 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, 60573958443 + 60573958444.

It is an arithmetic number, because the mean of its divisors is an integer number (60573958444).

Almost surely, 2^121147916887 is an apocalyptic number.

121147916887 is a deficient number, since it is larger than the sum of its proper divisors (1).

121147916887 is an equidigital number, since it uses as much as digits as its factorization.

121147916887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 55.

The spelling of 121147916887 in words is "one hundred twenty-one billion, one hundred forty-seven million, nine hundred sixteen thousand, eight hundred eighty-seven".