121887771009 has 8 divisors (see below), whose sum is σ = 162528197280. Its totient is φ = 81252929376.

The previous prime is 121887771007. The next prime is 121887771037. The reversal of 121887771009 is 900177788121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121887771009 - 2¹ = 121887771007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121887771007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344964 + ... + 1432725.

It is an arithmetic number, because the mean of its divisors is an integer number (20316024660).

Almost surely, 2^121887771009 is an apocalyptic number.

It is an amenable number.

121887771009 is a deficient number, since it is larger than the sum of its proper divisors (40640426271).

121887771009 is a wasteful number, since it uses less digits than its factorization.

121887771009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792319.

The product of its (nonzero) digits is 395136, while the sum is 51.

The spelling of 121887771009 in words is "one hundred twenty-one billion, eight hundred eighty-seven million, seven hundred seventy-one thousand, nine".