121588770987 has 6 divisors (see below), whose sum is σ = 175628224772. Its totient is φ = 81059180652.

The previous prime is 121588770959. The next prime is 121588771009. The reversal of 121588770987 is 789077885121.

It is not a de Polignac number, because 121588770987 - 2¹⁰ = 121588769963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121588770907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6754931713 + ... + 6754931730.

Almost surely, 2^121588770987 is an apocalyptic number.

121588770987 is a deficient number, since it is larger than the sum of its proper divisors (54039453785).

121588770987 is a wasteful number, since it uses less digits than its factorization.

121588770987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13509863449 (or 13509863446 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 63.

The spelling of 121588770987 in words is "one hundred twenty-one billion, five hundred eighty-eight million, seven hundred seventy thousand, nine hundred eighty-seven".